Fix an annotation

diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 0be63a7a58ea65a416068678e5eae68e8fa5efc9..7f3a4fabcb7c47993c1eed0672fd73c14d5e32b2 100644 (file)
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -15129,7 +15129,7 @@ gtk_tree_view_get_row_separator_func (GtkTreeView *tree_view)
 /**
  * gtk_tree_view_set_row_separator_func:
  * @tree_view: a #GtkTreeView
- * @func: a #GtkTreeViewRowSeparatorFunc
+ * @func: (allow-none): a #GtkTreeViewRowSeparatorFunc
  * @data: (allow-none): user data to pass to @func, or %NULL
  * @destroy: (allow-none): destroy notifier for @data, or %NULL
  *