diff --git a/src/gui/kernel/qwidgetwindow_qpa.cpp b/src/gui/kernel/qwidgetwindow_qpa.cpp
index fc49b30417..a58a03774e 100644
--- a/src/gui/kernel/qwidgetwindow_qpa.cpp
+++ b/src/gui/kernel/qwidgetwindow_qpa.cpp
@@ -91,13 +91,19 @@ bool QWidgetWindow::event(QEvent *event)
 void QWidgetWindow::handleMouseEvent(QMouseEvent *event)
 {
     // which child should have it?
-    QWidget *widget = m_widget->childAt(event->pos());
+    QWidget *widget = m_implicit_mouse_grabber ? m_implicit_mouse_grabber.data() : m_widget->childAt(event->pos());
 
     // TODO: make sure mouse release is delivered to same widget that got the press event
 
     if (!widget)
         widget = m_widget;
 
+    if (event->type() == QEvent::MouseButtonPress && !m_implicit_mouse_grabber)
+        m_implicit_mouse_grabber = widget;
+
+    if (event->buttons() == Qt::NoButton)
+        m_implicit_mouse_grabber.clear();
+
     QPoint mapped = widget->mapFrom(m_widget, event->pos());
 
     QMouseEvent translated(event->type(), mapped, event->globalPos(), event->button(), event->buttons(), event->modifiers());
diff --git a/src/gui/kernel/qwidgetwindow_qpa_p.h b/src/gui/kernel/qwidgetwindow_qpa_p.h
index 9d577d17f3..7a3ff46e65 100644
--- a/src/gui/kernel/qwidgetwindow_qpa_p.h
+++ b/src/gui/kernel/qwidgetwindow_qpa_p.h
@@ -72,6 +72,7 @@ protected:
 
 private:
     QWidget *m_widget;
+    QWeakPointer<QWidget> m_implicit_mouse_grabber;
 };
 
 QT_END_NAMESPACE