diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index 77b04bc057..bfa60fa657 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -636,6 +636,8 @@ void QGuiApplicationPrivate::processWheelEvent(QWindowSystemInterfacePrivate::Wh
 void QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent *e)
 {
     QWindow *window = e->window.data();
+    if (e->nullWindow)
+        window = QGuiApplication::activeWindow();
     if (!window)
         return;
 
diff --git a/src/gui/kernel/qwindowsysteminterface_qpa_p.h b/src/gui/kernel/qwindowsysteminterface_qpa_p.h
index 352092d066..77c219737d 100644
--- a/src/gui/kernel/qwindowsysteminterface_qpa_p.h
+++ b/src/gui/kernel/qwindowsysteminterface_qpa_p.h
@@ -128,8 +128,9 @@ public:
     class UserEvent : public WindowSystemEvent {
     public:
         UserEvent(QWindow * w, ulong time, EventType t)
-            : WindowSystemEvent(t), window(w), timestamp(time) { }
+            : WindowSystemEvent(t), window(w), nullWindow(w == 0), timestamp(time) { }
         QWeakPointer<QWindow> window;
+        bool nullWindow;
         unsigned long timestamp;
     };