diff --git a/gtk/gtktoolbar.c b/gtk/gtktoolbar.c
index edeab8817f..b2c4b15599 100644
--- a/gtk/gtktoolbar.c
+++ b/gtk/gtktoolbar.c
@@ -2532,7 +2532,7 @@ gtk_toolbar_forall (GtkContainer *container,
       list = next;
     }
   
-  if (include_internals)
+  if (include_internals && priv->arrow_button)
     callback (priv->arrow_button, callback_data);
 }