1 files changed, 9 insertions, 2 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoabackingstore.h b/src/plugins/platforms/cocoa/qcocoabackingstore.h
index 2398e6351e..9be6814ae7 100644
--- a/src/plugins/platforms/cocoa/qcocoabackingstore.h
+++ b/src/plugins/platforms/cocoa/qcocoabackingstore.h
@@ -49,7 +49,14 @@
 
 QT_BEGIN_NAMESPACE
 
-class QNSWindowBackingStore : public QRasterBackingStore
+class QCocoaBackingStore : public QRasterBackingStore
+{
+protected:
+    QCocoaBackingStore(QWindow *window);
+    QCFType<CGColorSpaceRef> colorSpace() const;
+};
+
+class QNSWindowBackingStore : public QCocoaBackingStore
 {
 public:
     QNSWindowBackingStore(QWindow *window);
@@ -64,7 +71,7 @@ private:
     void redrawRoundedBottomCorners(CGRect) const;
 };
 
-class QCALayerBackingStore : public QPlatformBackingStore
+class QCALayerBackingStore : public QCocoaBackingStore
 {
 public:
     QCALayerBackingStore(QWindow *window);