diff --git a/src/gui/kernel/qwindow_qpa.h b/src/gui/kernel/qwindow_qpa.h
index 35b26fb7a1..1a40ab510a 100644
--- a/src/gui/kernel/qwindow_qpa.h
+++ b/src/gui/kernel/qwindow_qpa.h
@@ -44,6 +44,8 @@
 
 #include <QObject>
 
+#include <QtGui/qwindowformat_qpa.h>
+
 QT_BEGIN_HEADER
 
 QT_BEGIN_NAMESPACE
@@ -69,13 +71,16 @@ public:
     };
     Q_DECLARE_FLAGS(WindowTypes, WindowType)
 
-    QWindow(const QWindowFormat &format, WindowType type = Window, QWindow *parent = 0);
+    QWindow(WindowType type = Window, QWindow *parent = 0);
     void setVisible(bool visible);
     void create();
 
     WId winId() const;
     void setParent(const QWindow *parent);
 
+    void setWindowFormat(const QWindowFormat &format);
+    QWindowFormat windowFormat() const;
+
     QString windowTitle() const;
 
     void setOpacity(qreal level);