diff --git a/src/widgets/kernel/qwidgetwindow.cpp b/src/widgets/kernel/qwidgetwindow.cpp
index 5290d79d9e..872572a7e2 100644
--- a/src/widgets/kernel/qwidgetwindow.cpp
+++ b/src/widgets/kernel/qwidgetwindow.cpp
@@ -873,14 +873,8 @@ void QWidgetWindow::handleExposeEvent(QExposeEvent *event)
 {
     if (isExposed()) {
         m_widget->setAttribute(Qt::WA_Mapped);
-        if (!event->region().isNull()) {
-            // Exposed native widgets need to be marked dirty to get them repainted correctly.
-            if (m_widget->internalWinId() && !m_widget->isWindow() && m_widget->isVisible() && m_widget->updatesEnabled()) {
-                if (QWidgetBackingStore *bs = m_widget->d_func()->maybeBackingStore())
-                    bs->markDirty(event->region(), m_widget);
-            }
+        if (!event->region().isNull())
             m_widget->d_func()->syncBackingStore(event->region());
-        }
     } else {
         m_widget->setAttribute(Qt::WA_Mapped, false);
     }
diff --git a/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp b/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
index 27be063333..3a4b563a6c 100644
--- a/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
+++ b/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
@@ -88,6 +88,7 @@ private slots:
 
     void tst_showWithoutActivating();
     void tst_paintEventOnSecondShow();
+    void tst_paintEventOnResize_QTBUG50796();
 
 #ifndef QT_NO_DRAGANDDROP
     void tst_dnd();
@@ -369,6 +370,29 @@ void tst_QWidget_window::tst_paintEventOnSecondShow()
     QTRY_VERIFY(w.paintEventCount > 0);
 }
 
+void tst_QWidget_window::tst_paintEventOnResize_QTBUG50796()
+{
+    const QRect availableGeo = QGuiApplication::primaryScreen()->availableGeometry();
+
+    QWidget root;
+    root.setGeometry(availableGeo.width()/2 - 100, availableGeo.height()/2 - 100,
+                     200, 200);
+
+    PaintTestWidget *native = new PaintTestWidget(&root);
+    native->winId(); // We're testing native widgets
+    native->setGeometry(10, 10, 50, 50);
+
+    root.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&root));
+    QVERIFY(QTest::qWaitForWindowActive(&root));
+    QVERIFY(native->isVisible());
+
+    native->paintEventCount = 0;
+    native->resize(native->width() + 10, native->height() + 10);
+    QTest::qWait(50); // Wait for paint events
+    QTRY_COMPARE(native->paintEventCount, 1); // Only one paint event must occur
+}
+
 #ifndef QT_NO_DRAGANDDROP
 
 /* DnD test for QWidgetWindow (handleDrag*Event() functions).