diff --git a/src/DockWidgetBase.h b/src/DockWidgetBase.h
index aef3818c..8fb167ad 100644
--- a/src/DockWidgetBase.h
+++ b/src/DockWidgetBase.h
@@ -316,7 +316,7 @@ Q_SIGNALS:
     void titleChanged();
 
     ///@brief emitted when the hosted widget changed
-    void widgetChanged(QWidgetOrQuick *);
+    void widgetChanged(KDDockWidgets::QWidgetOrQuick *);
 
     ///@brief emitted when the options change
     ///@sa setOptions(), options()