diff --git a/src/window.h b/src/window.h
index 08cb570b9c..1d0f4ec63b 100644
--- a/src/window.h
+++ b/src/window.h
@@ -1702,8 +1702,6 @@ protected:
      */
     Window *findWindowWithSameCaption() const;
 
-    bool tabTo(Window *other, bool behind, bool activate);
-
     void startShadeHoverTimer();
     void startShadeUnhoverTimer();
     void shadeHover();