diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index 9c6cb53365..e4888d6b87 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -2402,9 +2402,10 @@ void QWindowsWindow::aboutToMakeCurrent()
 
 void QWindowsWindow::setHasBorderInFullScreenStatic(QWindow *window, bool border)
 {
-    if (!window->handle())
-        return;
-    static_cast<QWindowsWindow *>(window->handle())->setHasBorderInFullScreen(border);
+    if (QPlatformWindow *handle = window->handle())
+        static_cast<QWindowsWindow *>(handle)->setHasBorderInFullScreen(border);
+    else
+        qWarning("%s invoked without window handle; call has no effect.", Q_FUNC_INFO);
 }
 
 void QWindowsWindow::setHasBorderInFullScreen(bool border)