diff --git a/gtk/gtktreemodel.c b/gtk/gtktreemodel.c
index a48df89ed1..d9cf4e7b42 100644
--- a/gtk/gtktreemodel.c
+++ b/gtk/gtktreemodel.c
@@ -632,7 +632,7 @@ gtk_tree_path_get_indices (GtkTreePath *path)
  * It also returns the number of elements in the array.
  * The array should not be freed.
  *
- * Return value: (array length=depth): The current indices, or %NULL.
+ * Return value: (array length=depth) (transfer none): The current indices, or %NULL.
  *
  * Since: 3.0
  **/