diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index 9458598128..3a1f08907c 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -5461,7 +5461,7 @@ void QWidgetPrivate::drawWidget(QPaintDevice *pdev, const QRegion &rgn, const QP
         QWidgetEffectSourcePrivate *sourced = static_cast<QWidgetEffectSourcePrivate *>
                                                          (source->d_func());
         if (!sourced->context) {
-            const QRegion effectRgn(rgn.boundingRect());
+            const QRegion effectRgn((flags & UseEffectRegionBounds) ? rgn.boundingRect() : rgn);
             QWidgetPaintContext context(pdev, effectRgn, offset, flags, sharedPainter, repaintManager);
             sourced->context = &context;
             if (!sharedPainter) {
@@ -5493,6 +5493,7 @@ void QWidgetPrivate::drawWidget(QPaintDevice *pdev, const QRegion &rgn, const QP
         }
     }
 #endif // QT_CONFIG(graphicseffect)
+    flags = flags & ~UseEffectRegionBounds;
 
     const bool alsoOnScreen = flags & DrawPaintOnScreen;
     const bool recursive = flags & DrawRecursive;
diff --git a/src/widgets/kernel/qwidget_p.h b/src/widgets/kernel/qwidget_p.h
index c66cce74a6..3b47349784 100644
--- a/src/widgets/kernel/qwidget_p.h
+++ b/src/widgets/kernel/qwidget_p.h
@@ -189,7 +189,8 @@ public:
         DontSubtractOpaqueChildren = 0x10,
         DontDrawOpaqueChildren = 0x20,
         DontDrawNativeChildren = 0x40,
-        DontSetCompositionMode = 0x80
+        DontSetCompositionMode = 0x80,
+        UseEffectRegionBounds = 0x100
     };
     Q_DECLARE_FLAGS(DrawWidgetFlags, DrawWidgetFlag)
     Q_FLAG(DrawWidgetFlags)
diff --git a/src/widgets/kernel/qwidgetrepaintmanager.cpp b/src/widgets/kernel/qwidgetrepaintmanager.cpp
index 720a6fd9de..5b65edcdeb 100644
--- a/src/widgets/kernel/qwidgetrepaintmanager.cpp
+++ b/src/widgets/kernel/qwidgetrepaintmanager.cpp
@@ -897,7 +897,8 @@ void QWidgetRepaintManager::paintAndFlush()
 
     // Paint the rest with composition.
     if (repaintAllWidgets || !dirtyCopy.isEmpty()) {
-        QWidgetPrivate::DrawWidgetFlags flags = QWidgetPrivate::DrawAsRoot | QWidgetPrivate::DrawRecursive;
+        QWidgetPrivate::DrawWidgetFlags flags = QWidgetPrivate::DrawAsRoot | QWidgetPrivate::DrawRecursive
+                | QWidgetPrivate::UseEffectRegionBounds;
         tlw->d_func()->drawWidget(store->paintDevice(), dirtyCopy, QPoint(), flags, nullptr, this);
     }