diff --git a/gtk/gtktexttagtable.c b/gtk/gtktexttagtable.c
index 1cf1a24a38..dd9eea941e 100644
--- a/gtk/gtktexttagtable.c
+++ b/gtk/gtktexttagtable.c
@@ -253,7 +253,7 @@ gtk_text_tag_table_add (GtkTextTagTable *table,
  * 
  * Look up a named tag.
  * 
- * Return value: The tag, or %NULL if none by that name is in the table.
+ * Return value: (transfer none): The tag, or %NULL if none by that name is in the table.
  **/
 GtkTextTag*
 gtk_text_tag_table_lookup (GtkTextTagTable *table,