--- ./GtkTreeModel.xs.tv	2003-07-22 21:12:06.000000000 +0200
+++ ./GtkTreeModel.xs	2003-07-22 21:17:44.000000000 +0200
@@ -352,7 +352,7 @@
 GtkTreeIter_copy *
 gtk_tree_model_iter_children (tree_model, parent)
 	GtkTreeModel *tree_model
-	GtkTreeIter *parent
+	GtkTreeIter_ornull *parent
     PREINIT:
 	GtkTreeIter iter;
     CODE: