diff --git a/app/actions/windows-actions.c b/app/actions/windows-actions.c
index 88b3b901b3..42e2355099 100644
--- a/app/actions/windows-actions.c
+++ b/app/actions/windows-actions.c
@@ -269,6 +269,7 @@ windows_actions_update (GimpActionGroup *group,
     }
 
   gimp_action_group_set_action_active (group, action, TRUE);
+  gimp_action_group_set_action_sensitive (group, "windows-tab-position", config->single_window_mode);
 
 #undef SET_ACTIVE
 }