diff --git a/include/wx/compositewin.h b/include/wx/compositewin.h
index 9236229fbc..9a3536854a 100644
--- a/include/wx/compositewin.h
+++ b/include/wx/compositewin.h
@@ -102,7 +102,7 @@ public:
 
         // The child layout almost invariably depends on the layout direction,
         // so redo it when it changes.
-        SetSize(-1, -1, -1, -1, wxSIZE_AUTO | wxSIZE_FORCE);
+        this->SetSize(-1, -1, -1, -1, wxSIZE_AUTO | wxSIZE_FORCE);
     }
 
 #if wxUSE_TOOLTIPS