diff --git a/workspace.h b/workspace.h
index efe9a63467..7e3989addc 100644
--- a/workspace.h
+++ b/workspace.h
@@ -419,7 +419,9 @@ public:
         return m_userActionsMenu;
     }
 
+#ifdef KWIN_BUILD_KAPPMENU
     void showApplicationMenu(const QPoint &, const WId);
+#endif
 
     void updateMinimizedOfTransients(Client*);
     void updateOnAllDesktopsOfTransients(Client*);