diff --git a/src/gui/accessible/qaccessible.cpp b/src/gui/accessible/qaccessible.cpp
index cb89fccc2d..59794a5a06 100644
--- a/src/gui/accessible/qaccessible.cpp
+++ b/src/gui/accessible/qaccessible.cpp
@@ -648,9 +648,8 @@ void QAccessible::setRootObject(QObject *object)
 void QAccessible::updateAccessibility(QObject *object, int child, Event reason)
 {
     Q_ASSERT(object);
-
-    QAccessibleEvent event = QAccessibleEvent(reason, object, child);
-    updateAccessibility(event);
+    QAccessibleEvent ev(reason, object, child);
+    updateAccessibility(&ev);
 }
 
 /*!
@@ -672,7 +671,7 @@ void QAccessible::updateAccessibility(QObject *object, int child, Event reason)
   the parameters of the call is expensive you can test isActive() to
   avoid unnecessary computations.
 */
-void QAccessible::updateAccessibility(const QAccessibleEvent &event)
+void QAccessible::updateAccessibility(QAccessibleEvent *event)
 {
     if (updateHandler) {
         updateHandler(event);
diff --git a/src/gui/accessible/qaccessible.h b/src/gui/accessible/qaccessible.h
index e8a5cf8bad..ffdd3fe7ce 100644
--- a/src/gui/accessible/qaccessible.h
+++ b/src/gui/accessible/qaccessible.h
@@ -327,7 +327,7 @@ public:
     };
 
     typedef QAccessibleInterface*(*InterfaceFactory)(const QString &key, QObject*);
-    typedef void(*UpdateHandler)(const QAccessibleEvent &event);
+    typedef void(*UpdateHandler)(QAccessibleEvent *event);
     typedef void(*RootObjectHandler)(QObject*);
 
     static void installFactory(InterfaceFactory);
@@ -338,7 +338,7 @@ public:
     static QAccessibleInterface *queryAccessibleInterface(QObject *);
 
     QT_DEPRECATED static void updateAccessibility(QObject *object, int child, Event reason);
-    static void updateAccessibility(const QAccessibleEvent &event);
+    static void updateAccessibility(QAccessibleEvent *event);
 
     static bool isActive();
     static void setRootObject(QObject *object);
diff --git a/src/gui/accessible/qaccessiblebridge.h b/src/gui/accessible/qaccessiblebridge.h
index 147bf30bd0..80830bd01c 100644
--- a/src/gui/accessible/qaccessiblebridge.h
+++ b/src/gui/accessible/qaccessiblebridge.h
@@ -60,7 +60,7 @@ class QAccessibleBridge
 public:
     virtual ~QAccessibleBridge() {}
     virtual void setRootObject(QAccessibleInterface *) = 0;
-    virtual void notifyAccessibilityUpdate(const QAccessibleEvent &event) = 0;
+    virtual void notifyAccessibilityUpdate(QAccessibleEvent *event) = 0;
 };
 
 struct Q_GUI_EXPORT QAccessibleBridgeFactoryInterface : public QFactoryInterface
diff --git a/src/gui/accessible/qaccessibleobject.cpp b/src/gui/accessible/qaccessibleobject.cpp
index e587ad077c..d3344c3a3a 100644
--- a/src/gui/accessible/qaccessibleobject.cpp
+++ b/src/gui/accessible/qaccessibleobject.cpp
@@ -162,6 +162,7 @@ QAccessibleInterface *QAccessibleObject::childAt(int x, int y) const
 {
     for (int i = 0; i < childCount(); ++i) {
         QAccessibleInterface *childIface = child(i);
+        Q_ASSERT(childIface);
         if (childIface->rect().contains(x,y)) {
             return childIface;
         }
diff --git a/src/gui/accessible/qplatformaccessibility_qpa.cpp b/src/gui/accessible/qplatformaccessibility_qpa.cpp
index 9de11e7c1f..057d43add3 100644
--- a/src/gui/accessible/qplatformaccessibility_qpa.cpp
+++ b/src/gui/accessible/qplatformaccessibility_qpa.cpp
@@ -75,7 +75,7 @@ QPlatformAccessibility::~QPlatformAccessibility()
 {
 }
 
-void QPlatformAccessibility::notifyAccessibilityUpdate(const QAccessibleEvent &event)
+void QPlatformAccessibility::notifyAccessibilityUpdate(QAccessibleEvent *event)
 {
     initialize();
 
diff --git a/src/gui/accessible/qplatformaccessibility_qpa.h b/src/gui/accessible/qplatformaccessibility_qpa.h
index 364f87b0c9..3bd6316d01 100644
--- a/src/gui/accessible/qplatformaccessibility_qpa.h
+++ b/src/gui/accessible/qplatformaccessibility_qpa.h
@@ -57,7 +57,7 @@ public:
     QPlatformAccessibility();
 
     virtual ~QPlatformAccessibility();
-    virtual void notifyAccessibilityUpdate(const QAccessibleEvent &event);
+    virtual void notifyAccessibilityUpdate(QAccessibleEvent *event);
     virtual void setRootObject(QObject *o);
     virtual void initialize();
     virtual void cleanup();
diff --git a/src/testlib/qtestaccessible.h b/src/testlib/qtestaccessible.h
index 048e048789..807cc2f846 100644
--- a/src/testlib/qtestaccessible.h
+++ b/src/testlib/qtestaccessible.h
@@ -140,17 +140,16 @@ private:
         }
     }
 
-    static void updateHandler(const QAccessibleEvent &event)
+    static void updateHandler(QAccessibleEvent *event)
     {
         eventList().append(copyEvent(event));
     }
-
-    static QAccessibleEvent *copyEvent(const QAccessibleEvent &event)
+    static QAccessibleEvent *copyEvent(QAccessibleEvent *event)
     {
-        if (event.type() == QAccessible::StateChanged)
-            return new QAccessibleStateChangeEvent(static_cast<const QAccessibleStateChangeEvent*>(&event)->changedStates(),
-                                               event.object(), event.child());
-        return new QAccessibleEvent(event.type(), event.object(), event.child());
+        if (event->type() == QAccessible::StateChanged)
+            return new QAccessibleStateChangeEvent(static_cast<const QAccessibleStateChangeEvent*>(event)->changedStates(),
+                                                   event->object(), event->child());
+        return new QAccessibleEvent(event->type(), event->object(), event->child());
     }
 
     static EventList &eventList()
diff --git a/src/widgets/dialogs/qdialog.cpp b/src/widgets/dialogs/qdialog.cpp
index f1a6a294d2..5d36bc07e8 100644
--- a/src/widgets/dialogs/qdialog.cpp
+++ b/src/widgets/dialogs/qdialog.cpp
@@ -754,7 +754,8 @@ void QDialog::setVisible(bool visible)
         }
 
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::DialogStart, this));
+        QAccessibleEvent event(QAccessible::DialogStart, this);
+        QAccessible::updateAccessibility(&event);
 #endif
 
     } else {
@@ -762,8 +763,10 @@ void QDialog::setVisible(bool visible)
             return;
 
 #ifndef QT_NO_ACCESSIBILITY
-        if (isVisible())
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::DialogEnd, this));
+        if (isVisible()) {
+            QAccessibleEvent event(QAccessible::DialogEnd, this);
+            QAccessible::updateAccessibility(&event);
+        }
 #endif
 
         // Reimplemented to exit a modal event loop when the dialog is hidden.
diff --git a/src/widgets/dialogs/qmessagebox.cpp b/src/widgets/dialogs/qmessagebox.cpp
index e1b134ee48..040f61dfc5 100644
--- a/src/widgets/dialogs/qmessagebox.cpp
+++ b/src/widgets/dialogs/qmessagebox.cpp
@@ -1463,7 +1463,8 @@ void QMessageBox::showEvent(QShowEvent *e)
     d->updateSize();
 
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Alert, this));
+    QAccessibleEvent event(QAccessible::Alert, this);
+    QAccessible::updateAccessibility(&event);
 #endif
 #ifdef Q_OS_WIN
     if (const HMENU systemMenu = qt_getWindowsSystemMenu(this)) {
diff --git a/src/widgets/graphicsview/qgraphicsscene.cpp b/src/widgets/graphicsview/qgraphicsscene.cpp
index 830853094a..752542c1ee 100644
--- a/src/widgets/graphicsview/qgraphicsscene.cpp
+++ b/src/widgets/graphicsview/qgraphicsscene.cpp
@@ -843,7 +843,8 @@ void QGraphicsScenePrivate::setFocusItemHelper(QGraphicsItem *item,
 #ifndef QT_NO_ACCESSIBILITY
     if (focusItem) {
         if (QGraphicsObject *focusObj = focusItem->toGraphicsObject()) {
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, focusObj));
+            QAccessibleEvent event(QAccessible::Focus, focusObj);
+            QAccessible::updateAccessibility(&event);
         }
     }
 #endif
diff --git a/src/widgets/itemviews/qabstractitemview.cpp b/src/widgets/itemviews/qabstractitemview.cpp
index 8530e2c23e..8992a3bdfe 100644
--- a/src/widgets/itemviews/qabstractitemview.cpp
+++ b/src/widgets/itemviews/qabstractitemview.cpp
@@ -1112,7 +1112,8 @@ void QAbstractItemView::reset()
 #ifdef Q_WS_X11
     if (QAccessible::isActive()) {
         QAccessible::queryAccessibleInterface(this)->table2Interface()->modelReset();
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TableModelChanged, this, 0));
+        QAccessibleEvent event(QAccessible::TableModelChanged, this, 0);
+        QAccessible::updateAccessibility(&event);
     }
 #endif
 #endif
@@ -3342,7 +3343,8 @@ void QAbstractItemViewPrivate::_q_rowsRemoved(const QModelIndex &index, int star
 #ifdef Q_WS_X11
     if (QAccessible::isActive()) {
         QAccessible::queryAccessibleInterface(q)->table2Interface()->rowsRemoved(index, start, end);
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TableModelChanged, q, 0));
+        QAccessibleEvent event(QAccessible::TableModelChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
     }
 #endif
 #endif
@@ -3422,7 +3424,8 @@ void QAbstractItemViewPrivate::_q_columnsRemoved(const QModelIndex &index, int s
 #ifdef Q_WS_X11
     if (QAccessible::isActive()) {
         QAccessible::queryAccessibleInterface(q)->table2Interface()->columnsRemoved(index, start, end);
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TableModelChanged, q, 0));
+        QAccessibleEvent event(QAccessible::TableModelChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
     }
 #endif
 #endif
@@ -3445,7 +3448,8 @@ void QAbstractItemViewPrivate::_q_rowsInserted(const QModelIndex &index, int sta
     Q_Q(QAbstractItemView);
     if (QAccessible::isActive()) {
         QAccessible::queryAccessibleInterface(q)->table2Interface()->rowsInserted(index, start, end);
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TableModelChanged, q, 0));
+        QAccessibleEvent event(QAccessible::TableModelChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
     }
 #endif
 #endif
@@ -3469,7 +3473,8 @@ void QAbstractItemViewPrivate::_q_columnsInserted(const QModelIndex &index, int
 #ifdef Q_WS_X11
     if (QAccessible::isActive()) {
         QAccessible::queryAccessibleInterface(q)->table2Interface()->columnsInserted(index, start, end);
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TableModelChanged, q, 0));
+        QAccessibleEvent event(QAccessible::TableModelChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
     }
 #endif
 #endif
@@ -3497,7 +3502,8 @@ void QAbstractItemViewPrivate::_q_layoutChanged()
     Q_Q(QAbstractItemView);
     if (QAccessible::isActive()) {
         QAccessible::queryAccessibleInterface(q)->table2Interface()->modelReset();
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TableModelChanged, q, 0));
+        QAccessibleEvent event(QAccessible::TableModelChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
     }
 #endif
 #endif
diff --git a/src/widgets/itemviews/qlistview.cpp b/src/widgets/itemviews/qlistview.cpp
index b00b1073a3..872798a8e9 100644
--- a/src/widgets/itemviews/qlistview.cpp
+++ b/src/widgets/itemviews/qlistview.cpp
@@ -3169,7 +3169,8 @@ void QListView::currentChanged(const QModelIndex &current, const QModelIndex &pr
     if (QAccessible::isActive()) {
         if (current.isValid()) {
             int entry = visualIndex(current) + 1;
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, this, entry));
+            QAccessibleEvent event(QAccessible::Focus, this, entry);
+            QAccessible::updateAccessibility(&event);
         }
     }
 #endif
@@ -3188,12 +3189,14 @@ void QListView::selectionChanged(const QItemSelection &selected,
         QModelIndex sel = selected.indexes().value(0);
         if (sel.isValid()) {
             int entry = visualIndex(sel) + 1;
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Selection, this, entry));
+            QAccessibleEvent event(QAccessible::Selection, this, entry);
+            QAccessible::updateAccessibility(&event);
         }
         QModelIndex desel = deselected.indexes().value(0);
         if (desel.isValid()) {
             int entry = visualIndex(desel) + 1;
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::SelectionRemove, this, entry));
+            QAccessibleEvent event(QAccessible::SelectionRemove, this, entry);
+            QAccessible::updateAccessibility(&event);
         }
     }
 #endif
diff --git a/src/widgets/itemviews/qtableview.cpp b/src/widgets/itemviews/qtableview.cpp
index a5e03ca9e4..55cf18d78c 100644
--- a/src/widgets/itemviews/qtableview.cpp
+++ b/src/widgets/itemviews/qtableview.cpp
@@ -3180,16 +3180,10 @@ void QTableView::currentChanged(const QModelIndex &current, const QModelIndex &p
 #ifndef QT_NO_ACCESSIBILITY
     if (QAccessible::isActive()) {
         if (current.isValid()) {
-#ifdef Q_OS_UNIX
             Q_D(QTableView);
             int entry = d->accessibleTable2Index(current);
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, this, entry));
-#else
-            int entry = visualIndex(current) + 1;
-            if (horizontalHeader())
-                ++entry;
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, viewport(), entry));
-#endif
+            QAccessibleEvent event(QAccessible::Focus, this, entry);
+            QAccessible::updateAccessibility(&event);
         }
     }
 #endif
@@ -3209,27 +3203,15 @@ void QTableView::selectionChanged(const QItemSelection &selected,
         // ### does not work properly for selection ranges.
         QModelIndex sel = selected.indexes().value(0);
         if (sel.isValid()) {
-#ifdef Q_OS_UNIX
             int entry = d->accessibleTable2Index(sel);
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Selection, this, entry));
-#else
-            int entry = visualIndex(sel);
-            if (horizontalHeader())
-                ++entry;
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Selection, viewport(), entry));
-#endif
+            QAccessibleEvent event(QAccessible::Selection, this, entry);
+            QAccessible::updateAccessibility(&event);
         }
         QModelIndex desel = deselected.indexes().value(0);
         if (desel.isValid()) {
-#ifdef Q_OS_UNIX
             int entry = d->accessibleTable2Index(desel);
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::SelectionRemove, this, entry));
-#else
-            int entry = visualIndex(sel);
-            if (horizontalHeader())
-                ++entry;
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::SelectionRemove, viewport(), entry));
-#endif
+            QAccessibleEvent event(QAccessible::SelectionRemove, this, entry);
+            QAccessible::updateAccessibility(&event);
         }
     }
 #endif
diff --git a/src/widgets/itemviews/qtreeview.cpp b/src/widgets/itemviews/qtreeview.cpp
index e2be4990d9..6166823754 100644
--- a/src/widgets/itemviews/qtreeview.cpp
+++ b/src/widgets/itemviews/qtreeview.cpp
@@ -2937,7 +2937,8 @@ void QTreeViewPrivate::insertViewItems(int pos, int count, const QTreeViewItem &
 #ifndef QT_NO_ACCESSIBILITY
 #ifdef Q_OS_UNIX
     if (QAccessible::isActive()) {
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TableModelChanged, q, 0));
+        QAccessibleEvent event(QAccessible::TableModelChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
     }
 #endif
 #endif
@@ -2955,7 +2956,8 @@ void QTreeViewPrivate::removeViewItems(int pos, int count)
 #ifndef QT_NO_ACCESSIBILITY
 #ifdef Q_OS_UNIX
     if (QAccessible::isActive()) {
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TableModelChanged, q, 0));
+        QAccessibleEvent event(QAccessible::TableModelChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
     }
 #endif
 #endif
@@ -3769,7 +3771,8 @@ void QTreeView::currentChanged(const QModelIndex &current, const QModelIndex &pr
     if (QAccessible::isActive() && current.isValid()) {
 #ifdef Q_OS_UNIX
         int entry = (visualIndex(current) + (header()?1:0))*current.model()->columnCount()+current.column() + 1;
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, this, entry));
+        QAccessibleEvent event(QAccessible::Focus, this, entry);
+        QAccessible::updateAccessibility(&event);
 #else
         int entry = visualIndex(current) + 1;
         if (header())
@@ -3794,13 +3797,15 @@ void QTreeView::selectionChanged(const QItemSelection &selected,
         if (sel.isValid()) {
             int entry = (visualIndex(sel) + (header()?1:0))*sel.model()->columnCount()+sel.column() + 1;
             Q_ASSERT(entry > 0);
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Selection, this, entry));
+            QAccessibleEvent event(QAccessible::Selection, this, entry);
+            QAccessible::updateAccessibility(&event);
         }
         QModelIndex desel = deselected.indexes().value(0);
         if (desel.isValid()) {
             int entry = (visualIndex(desel) + (header()?1:0))*desel.model()->columnCount()+desel.column() + 1;
             Q_ASSERT(entry > 0);
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::SelectionRemove, this, entry));
+            QAccessibleEvent event(QAccessible::SelectionRemove, this, entry);
+            QAccessible::updateAccessibility(&event);
         }
     }
 #endif
diff --git a/src/widgets/kernel/qwhatsthis.cpp b/src/widgets/kernel/qwhatsthis.cpp
index 1c20b98139..114cde59e9 100644
--- a/src/widgets/kernel/qwhatsthis.cpp
+++ b/src/widgets/kernel/qwhatsthis.cpp
@@ -412,7 +412,8 @@ QWhatsThisPrivate::QWhatsThisPrivate()
 #endif
     }
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ContextHelpStart, this));
+    QAccessibleEvent event(QAccessible::ContextHelpStart, this);
+    QAccessible::updateAccessibility(&event);
 #endif
 }
 
@@ -424,7 +425,8 @@ QWhatsThisPrivate::~QWhatsThisPrivate()
     QApplication::restoreOverrideCursor();
 #endif
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ContextHelpEnd, this));
+    QAccessibleEvent event(QAccessible::ContextHelpEnd, this);
+    QAccessible::updateAccessibility(&event);
 #endif
     instance = 0;
 }
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index be1782bc4d..a4bb205b76 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -5965,7 +5965,10 @@ void QWidget::setFocus(Qt::FocusReason reason)
         // menus update the focus manually and this would create bogus events
         if (!(f->inherits("QMenuBar") || f->inherits("QMenu") || f->inherits("QMenuItem")))
 # endif
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, f));
+        {
+            QAccessibleEvent event(QAccessible::Focus, f);
+            QAccessible::updateAccessibility(&event);
+        }
 #endif
 #ifndef QT_NO_GRAPHICSVIEW
         if (QWExtra *topData = window()->d_func()->extra) {
@@ -6045,7 +6048,8 @@ void QWidget::clearFocus()
 #endif
         {
 #ifndef QT_NO_ACCESSIBILITY
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, this));
+            QAccessibleEvent event(QAccessible::Focus, this);
+            QAccessible::updateAccessibility(&event);
 #endif
         }
     }
@@ -7051,8 +7055,10 @@ void QWidgetPrivate::show_helper()
         qApp->d_func()->openPopup(q);
 
 #ifndef QT_NO_ACCESSIBILITY
-    if (q->windowType() != Qt::ToolTip)     // Tooltips are read aloud twice in MS narrator.
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ObjectShow, q));
+    if (q->windowType() != Qt::ToolTip) {    // Tooltips are read aloud twice in MS narrator.
+        QAccessibleEvent event(QAccessible::ObjectShow, q);
+        QAccessible::updateAccessibility(&event);
+    }
 #endif
 
     if (QApplicationPrivate::hidden_focus_widget == q) {
@@ -7142,8 +7148,10 @@ void QWidgetPrivate::hide_helper()
         bs->removeDirtyWidget(q);
 
 #ifndef QT_NO_ACCESSIBILITY
-    if (wasVisible)
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ObjectHide, q));
+    if (wasVisible) {
+        QAccessibleEvent event(QAccessible::ObjectHide, q);
+        QAccessible::updateAccessibility(&event);
+    }
 #endif
 }
 
@@ -7374,8 +7382,10 @@ void QWidgetPrivate::hideChildren(bool spontaneous)
         }
         qApp->d_func()->sendSyntheticEnterLeave(widget);
 #ifndef QT_NO_ACCESSIBILITY
-        if (!spontaneous)
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ObjectHide, widget));
+        if (!spontaneous) {
+            QAccessibleEvent event(QAccessible::ObjectHide, widget);
+            QAccessible::updateAccessibility(&event);
+        }
 #endif
     }
 }
@@ -8250,7 +8260,8 @@ void QWidget::changeEvent(QEvent * event)
 #ifndef QT_NO_ACCESSIBILITY
         QAccessible::State s;
         s.disabled = true;
-        QAccessible::updateAccessibility(QAccessibleStateChangeEvent(s, this));
+        QAccessibleStateChangeEvent event(s, this);
+        QAccessible::updateAccessibility(&event);
 #endif
         break;
     }
@@ -10391,7 +10402,8 @@ void QWidget::setAccessibleName(const QString &name)
 {
     Q_D(QWidget);
     d->accessibleName = name;
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, this));
+    QAccessibleEvent event(QAccessible::NameChanged, this);
+    QAccessible::updateAccessibility(&event);
 }
 
 QString QWidget::accessibleName() const
@@ -10413,7 +10425,8 @@ void QWidget::setAccessibleDescription(const QString &description)
 {
     Q_D(QWidget);
     d->accessibleDescription = description;
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::DescriptionChanged, this));
+    QAccessibleEvent event(QAccessible::DescriptionChanged, this);
+    QAccessible::updateAccessibility(&event);
 }
 
 QString QWidget::accessibleDescription() const
diff --git a/src/widgets/widgets/qabstractbutton.cpp b/src/widgets/widgets/qabstractbutton.cpp
index aebef8ddc9..0b24799a56 100644
--- a/src/widgets/widgets/qabstractbutton.cpp
+++ b/src/widgets/widgets/qabstractbutton.cpp
@@ -644,7 +644,8 @@ void QAbstractButton::setText(const QString &text)
     update();
     updateGeometry();
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, this));
+    QAccessibleEvent event(QAccessible::NameChanged, this);
+    QAccessible::updateAccessibility(&event);
 #endif
 }
 
@@ -769,7 +770,8 @@ void QAbstractButton::setChecked(bool checked)
 #ifndef QT_NO_ACCESSIBILITY
     QAccessible::State s;
     s.checked = true;
-    QAccessible::updateAccessibility(QAccessibleStateChangeEvent(s, this));
+    QAccessibleStateChangeEvent event(s, this);
+    QAccessible::updateAccessibility(&event);
 #endif
 }
 
diff --git a/src/widgets/widgets/qabstractslider.cpp b/src/widgets/widgets/qabstractslider.cpp
index b0216e5277..2d3f79e43d 100644
--- a/src/widgets/widgets/qabstractslider.cpp
+++ b/src/widgets/widgets/qabstractslider.cpp
@@ -538,7 +538,8 @@ void QAbstractSlider::setValue(int value)
             emit sliderMoved((d->position = value));
     }
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ValueChanged, this));
+    QAccessibleEvent event(QAccessible::ValueChanged, this);
+    QAccessible::updateAccessibility(&event);
 #endif
     sliderChange(SliderValueChange);
     emit valueChanged(value);
diff --git a/src/widgets/widgets/qabstractspinbox.cpp b/src/widgets/widgets/qabstractspinbox.cpp
index c083369136..7b55b0fa8c 100644
--- a/src/widgets/widgets/qabstractspinbox.cpp
+++ b/src/widgets/widgets/qabstractspinbox.cpp
@@ -976,7 +976,8 @@ void QAbstractSpinBox::keyPressEvent(QKeyEvent *event)
             }
         }
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ValueChanged, this));
+        QAccessibleEvent event(QAccessible::ValueChanged, this);
+        QAccessible::updateAccessibility(&event);
 #endif
         return;
     }
@@ -1595,7 +1596,8 @@ void QAbstractSpinBoxPrivate::updateState(bool up, bool fromKeyboard /* = false
         buttonState = (up ? Up : Down) | (fromKeyboard ? Keyboard : Mouse);
         q->stepBy(up ? 1 : -1);
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ValueChanged, q));
+        QAccessibleEvent event(QAccessible::ValueChanged, q);
+        QAccessible::updateAccessibility(&event);
 #endif
     }
 }
diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index 8d40d17fb1..88c17ca704 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -983,7 +983,8 @@ void QComboBoxPrivate::_q_dataChanged(const QModelIndex &topLeft, const QModelIn
         q->update();
     }
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, q, 0));
+        QAccessibleEvent event(QAccessible::NameChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
 #endif
 }
 
@@ -1239,7 +1240,8 @@ void QComboBoxPrivate::_q_emitCurrentIndexChanged(const QModelIndex &index)
     emit q->currentIndexChanged(index.row());
     emit q->currentIndexChanged(itemText(index));
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, q, 0));
+        QAccessibleEvent event(QAccessible::NameChanged, q, 0);
+        QAccessible::updateAccessibility(&event);
 #endif
 }
 
@@ -2587,7 +2589,8 @@ void QComboBox::clear()
     Q_D(QComboBox);
     d->model->removeRows(0, d->model->rowCount(d->root), d->root);
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, this, 0));
+        QAccessibleEvent event(QAccessible::NameChanged, this, 0);
+        QAccessible::updateAccessibility(&event);
 #endif
 }
 
@@ -2606,7 +2609,8 @@ void QComboBox::clearEditText()
     if (d->lineEdit)
         d->lineEdit->clear();
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, this, 0));
+        QAccessibleEvent event(QAccessible::NameChanged, this, 0);
+        QAccessible::updateAccessibility(&event);
 #endif
 }
 
@@ -2619,7 +2623,8 @@ void QComboBox::setEditText(const QString &text)
     if (d->lineEdit)
         d->lineEdit->setText(text);
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, this, 0));
+        QAccessibleEvent event(QAccessible::NameChanged, this, 0);
+        QAccessible::updateAccessibility(&event);
 #endif
 }
 
diff --git a/src/widgets/widgets/qgroupbox.cpp b/src/widgets/widgets/qgroupbox.cpp
index cf3e14871f..7186ddfccc 100644
--- a/src/widgets/widgets/qgroupbox.cpp
+++ b/src/widgets/widgets/qgroupbox.cpp
@@ -249,7 +249,8 @@ void QGroupBox::setTitle(const QString &title)
     update();
     updateGeometry();
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, this, 0));
+    QAccessibleEvent event(QAccessible::NameChanged, this, 0);
+    QAccessible::updateAccessibility(&event);
 #endif
 }
 
diff --git a/src/widgets/widgets/qlabel.cpp b/src/widgets/widgets/qlabel.cpp
index 82e56f3354..f36dea52dd 100644
--- a/src/widgets/widgets/qlabel.cpp
+++ b/src/widgets/widgets/qlabel.cpp
@@ -315,8 +315,10 @@ void QLabel::setText(const QString &text)
     d->updateLabel();
 
 #ifndef QT_NO_ACCESSIBILITY
-    if (accessibleName().isEmpty())
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::NameChanged, this, 0));
+    if (accessibleName().isEmpty()) {
+        QAccessibleEvent event(QAccessible::NameChanged, this, 0);
+        QAccessible::updateAccessibility(&event);
+    }
 #endif
 }
 
diff --git a/src/widgets/widgets/qlineedit_p.cpp b/src/widgets/widgets/qlineedit_p.cpp
index d06e98e31a..37e956c27f 100644
--- a/src/widgets/widgets/qlineedit_p.cpp
+++ b/src/widgets/widgets/qlineedit_p.cpp
@@ -144,7 +144,8 @@ void QLineEditPrivate::_q_selectionChanged()
 
     emit q->selectionChanged();
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TextSelectionChanged, q));
+    QAccessibleEvent event(QAccessible::TextSelectionChanged, q);
+    QAccessible::updateAccessibility(&event);
 #endif
 }
 
diff --git a/src/widgets/widgets/qmenu.cpp b/src/widgets/widgets/qmenu.cpp
index af4a87e282..7d4f7151a4 100644
--- a/src/widgets/widgets/qmenu.cpp
+++ b/src/widgets/widgets/qmenu.cpp
@@ -1076,8 +1076,10 @@ void QMenuPrivate::activateAction(QAction *action, QAction::ActionEvent action_e
 #ifndef QT_NO_ACCESSIBILITY
         if (QAccessible::isActive()) {
             int actionIndex = indexOf(action);
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, q, actionIndex));
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Selection, q, actionIndex));
+            QAccessibleEvent focusEvent(QAccessible::Focus, q, actionIndex);
+            QAccessible::updateAccessibility(&focusEvent);
+            QAccessibleEvent selectionEvent(QAccessible::Selection, q, actionIndex);
+            QAccessible::updateAccessibility(&selectionEvent);
         }
 #endif
         action->showStatusText(topCausedWidget());
@@ -1970,7 +1972,8 @@ void QMenu::popup(const QPoint &p, QAction *atAction)
     }
 
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::PopupMenuStart, this ,0));
+    QAccessibleEvent event(QAccessible::PopupMenuStart, this ,0);
+    QAccessible::updateAccessibility(&event);
 #endif
 }
 
@@ -2091,7 +2094,8 @@ void QMenu::hideEvent(QHideEvent *)
         d->eventLoop->exit();
     d->setCurrentAction(0);
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::PopupMenuEnd, this));
+    QAccessibleEvent event(QAccessible::PopupMenuEnd, this);
+    QAccessible::updateAccessibility(&event);
 #endif
 #ifndef QT_NO_MENUBAR
     if (QMenuBar *mb = qobject_cast<QMenuBar*>(d->causedPopup.widget))
diff --git a/src/widgets/widgets/qmenubar.cpp b/src/widgets/widgets/qmenubar.cpp
index 0efa6caebc..2712839103 100644
--- a/src/widgets/widgets/qmenubar.cpp
+++ b/src/widgets/widgets/qmenubar.cpp
@@ -531,8 +531,10 @@ void QMenuBarPrivate::_q_actionHovered()
 #ifndef QT_NO_ACCESSIBILITY
         if (QAccessible::isActive()) {
             int actionIndex = actions.indexOf(action);
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, q, actionIndex));
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Selection, q, actionIndex));
+            QAccessibleEvent focusEvent(QAccessible::Focus, q, actionIndex);
+            QAccessible::updateAccessibility(&focusEvent);
+            QAccessibleEvent selectionEvent(QAccessible::Selection, q, actionIndex);
+            QAccessible::updateAccessibility(&selectionEvent);
         }
 #endif //QT_NO_ACCESSIBILITY
     }
diff --git a/src/widgets/widgets/qprogressbar.cpp b/src/widgets/widgets/qprogressbar.cpp
index c1a34bfb7a..0439caeb88 100644
--- a/src/widgets/widgets/qprogressbar.cpp
+++ b/src/widgets/widgets/qprogressbar.cpp
@@ -314,7 +314,8 @@ void QProgressBar::setValue(int value)
     d->value = value;
     emit valueChanged(value);
 #ifndef QT_NO_ACCESSIBILITY
-    QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::ValueChanged, this));
+    QAccessibleEvent event(QAccessible::ValueChanged, this);
+    QAccessible::updateAccessibility(&event);
 #endif
     if (d->repaintRequired())
         repaint();
diff --git a/src/widgets/widgets/qpushbutton.cpp b/src/widgets/widgets/qpushbutton.cpp
index 059b0f801c..5dae4e0b34 100644
--- a/src/widgets/widgets/qpushbutton.cpp
+++ b/src/widgets/widgets/qpushbutton.cpp
@@ -378,7 +378,8 @@ void QPushButton::setDefault(bool enable)
 #ifndef QT_NO_ACCESSIBILITY
     QAccessible::State s;
     s.defaultButton = true;
-    QAccessible::updateAccessibility(QAccessibleStateChangeEvent(s, this));
+    QAccessibleStateChangeEvent event(s, this);
+    QAccessible::updateAccessibility(&event);
 #endif
 }
 
diff --git a/src/widgets/widgets/qtabbar.cpp b/src/widgets/widgets/qtabbar.cpp
index ce25a22847..af360701fa 100644
--- a/src/widgets/widgets/qtabbar.cpp
+++ b/src/widgets/widgets/qtabbar.cpp
@@ -1183,8 +1183,10 @@ void QTabBar::setCurrentIndex(int index)
         d->layoutTab(index);
 #ifndef QT_NO_ACCESSIBILITY
         if (QAccessible::isActive()) {
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Focus, this, index));
-            QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::Selection, this, index));
+            QAccessibleEvent focusEvent(QAccessible::Focus, this, index);
+            QAccessible::updateAccessibility(&focusEvent);
+            QAccessibleEvent selectionEvent(QAccessible::Selection, this, index);
+            QAccessible::updateAccessibility(&selectionEvent);
         }
 #endif
         emit currentChanged(index);
diff --git a/src/widgets/widgets/qwidgetlinecontrol.cpp b/src/widgets/widgets/qwidgetlinecontrol.cpp
index a04339f864..7c659ebb64 100644
--- a/src/widgets/widgets/qwidgetlinecontrol.cpp
+++ b/src/widgets/widgets/qwidgetlinecontrol.cpp
@@ -767,8 +767,10 @@ void QWidgetLineControl::internalSetText(const QString &txt, int pos, bool edite
     bool changed = finishChange(-1, true, edited);
 
 #ifndef QT_NO_ACCESSIBILITY
-    if (changed)
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TextUpdated, parent()));
+    if (changed) {
+        QAccessibleEvent event(QAccessible::TextUpdated, parent());
+        QAccessible::updateAccessibility(&event);
+    }
 #endif
 }
 
@@ -1367,7 +1369,8 @@ void QWidgetLineControl::emitCursorPositionChanged()
         m_lastCursorPos = m_cursor;
         cursorPositionChanged(oldLast, m_cursor);
 #ifndef QT_NO_ACCESSIBILITY
-        QAccessible::updateAccessibility(QAccessibleEvent(QAccessible::TextCaretMoved, parent()));
+        QAccessibleEvent event(QAccessible::TextCaretMoved, parent());
+        QAccessible::updateAccessibility(&event);
 #endif
     }
 }