diff --git a/gtk/gtktreemenu.c b/gtk/gtktreemenu.c
index bef19053f4..bd7e1fdf02 100644
--- a/gtk/gtktreemenu.c
+++ b/gtk/gtktreemenu.c
@@ -5,6 +5,8 @@
  * Authors:
  *      Tristan Van Berkom <tristanvb@openismus.com>
  *
+ * Based on some GtkComboBox menu code by Kristian Rietveld <kris@gtk.org>
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either