diff --git a/src/Gui/ViewProviderOriginGroupExtension.h b/src/Gui/ViewProviderOriginGroupExtension.h
index a204fd920a..8e8abe38e0 100644
--- a/src/Gui/ViewProviderOriginGroupExtension.h
+++ b/src/Gui/ViewProviderOriginGroupExtension.h
@@ -48,7 +48,7 @@ public:
 
     void updateOriginSize();
 
-    virtual bool extensionAllowTreeOrderSwap(const App::DocumentObject *, const App::DocumentObject *) const { return false; }
+    virtual bool extensionAllowTreeOrderSwap(const App::DocumentObject *, const App::DocumentObject *) const override { return false; }
     
 protected:
     void slotChangedObjectApp ( const App::DocumentObject& obj );