diff --git a/src/widgets/kernel/qwindowcontainer.cpp b/src/widgets/kernel/qwindowcontainer.cpp
index 1247c4c6a67..cfd785a82c2 100644
--- a/src/widgets/kernel/qwindowcontainer.cpp
+++ b/src/widgets/kernel/qwindowcontainer.cpp
@@ -245,6 +245,9 @@ QWindowContainer::~QWindowContainer()
         d->window->destroy();
 
     delete d->window;
+
+    disconnect(qGuiApp, &QGuiApplication::focusWindowChanged,
+               this, &QWindowContainer::focusWindowChanged);
 }