1 files changed, 1 insertions, 1 deletions
diff --git a/src/widgets/kernel/qwindowcontainer_p.h b/src/widgets/kernel/qwindowcontainer_p.h
index c6de168c10..72474077aa 100644
--- a/src/widgets/kernel/qwindowcontainer_p.h
+++ b/src/widgets/kernel/qwindowcontainer_p.h
@@ -64,7 +64,7 @@ class Q_WIDGETS_EXPORT QWindowContainer : public QWidget
     Q_DECLARE_PRIVATE(QWindowContainer)
 
 public:
-    explicit QWindowContainer(QWindow *embeddedWindow, QWidget *parent = nullptr, Qt::WindowFlags f = nullptr);
+    explicit QWindowContainer(QWindow *embeddedWindow, QWidget *parent = nullptr, Qt::WindowFlags f = { });
     ~QWindowContainer();
     QWindow *containedWindow() const;