1 files changed, 4 insertions, 0 deletions
diff --git a/src/gui/kernel/qwindow_p.h b/src/gui/kernel/qwindow_p.h
index 2016c42d7e..0a051ae965 100644
--- a/src/gui/kernel/qwindow_p.h
+++ b/src/gui/kernel/qwindow_p.h
@@ -56,6 +56,8 @@ QT_MODULE(Gui)
 
 class Q_GUI_EXPORT QWindowPrivate : public QObjectPrivate
 {
+    Q_DECLARE_PUBLIC(QWindow)
+
 public:
     QWindowPrivate()
         : QObjectPrivate()
@@ -77,6 +79,8 @@ public:
     {
     }
 
+    void maybeQuitOnLastWindowClosed();
+
     QWindow::SurfaceType surfaceType;
     Qt::WindowFlags windowFlags;
     QWindow *parentWindow;