diff --git a/src/gui/kernel/qwindow.h b/src/gui/kernel/qwindow.h
index 711761e5e0..315c403d20 100644
--- a/src/gui/kernel/qwindow.h
+++ b/src/gui/kernel/qwindow.h
@@ -254,7 +254,6 @@ public Q_SLOTS:
     }
 
 Q_SIGNALS:
-    void backBufferReady();
     void screenChanged(QScreen *screen);
     void windowModalityChanged(Qt::WindowModality windowModality);