diff --git a/src/gui/kernel/qpaintdevicewindow.cpp b/src/gui/kernel/qpaintdevicewindow.cpp
index bc7ac89b035..9e8c6ae5a85 100644
--- a/src/gui/kernel/qpaintdevicewindow.cpp
+++ b/src/gui/kernel/qpaintdevicewindow.cpp
@@ -171,6 +171,8 @@ bool QPaintDeviceWindow::event(QEvent *event)
         auto region = QRect(QPoint(0, 0), size());
         d->doFlush(region); // Will end up calling paintEvent
         return true;
+    } else if (event->type() == QEvent::Resize) {
+        d->handleResizeEvent();
     }
 
     return QWindow::event(event);
diff --git a/src/gui/kernel/qpaintdevicewindow_p.h b/src/gui/kernel/qpaintdevicewindow_p.h
index 2fdac02e0ab..85c11cbf916 100644
--- a/src/gui/kernel/qpaintdevicewindow_p.h
+++ b/src/gui/kernel/qpaintdevicewindow_p.h
@@ -31,6 +31,8 @@ public:
     QPaintDeviceWindowPrivate();
     ~QPaintDeviceWindowPrivate() override;
 
+    virtual void handleResizeEvent() {}
+
     virtual void beginPaint(const QRegion &region)
     {
         Q_UNUSED(region);
diff --git a/src/gui/kernel/qrasterwindow.cpp b/src/gui/kernel/qrasterwindow.cpp
index 7888db67777..f292344ca1f 100644
--- a/src/gui/kernel/qrasterwindow.cpp
+++ b/src/gui/kernel/qrasterwindow.cpp
@@ -34,6 +34,13 @@ class QRasterWindowPrivate : public QPaintDeviceWindowPrivate
 {
     Q_DECLARE_PUBLIC(QRasterWindow)
 public:
+    void handleResizeEvent() override
+    {
+        Q_Q(QRasterWindow);
+        if (backingstore->size() != q->size())
+            markWindowAsDirty();
+    }
+
     void beginPaint(const QRegion &region) override
     {
         Q_Q(QRasterWindow);
@@ -103,9 +110,6 @@ QPaintDevice *QRasterWindow::redirected(QPoint *) const
 
 void QRasterWindow::resizeEvent(QResizeEvent *)
 {
-    Q_D(QRasterWindow);
-    if (d->backingstore->size() != size())
-        d->markWindowAsDirty();
 }
 
 QT_END_NAMESPACE