diff --git a/src/plugins/platforms/cocoa/qcocoaintegration.mm b/src/plugins/platforms/cocoa/qcocoaintegration.mm
index c29fda0288..e2a206abc2 100644
--- a/src/plugins/platforms/cocoa/qcocoaintegration.mm
+++ b/src/plugins/platforms/cocoa/qcocoaintegration.mm
@@ -119,7 +119,7 @@ QPlatformGLContext *QCocoaIntegration::createPlatformGLContext(const QGuiGLForma
 
 QPlatformBackingStore *QCocoaIntegration::createPlatformBackingStore(QWindow *window) const
 {
-    return new QCocoaBackingStore(window, winId);
+    return new QCocoaBackingStore(window);
 }
 
 QPlatformFontDatabase *QCocoaIntegration::fontDatabase() const