diff --git a/glib/gutils.c b/glib/gutils.c
index e4fffa4d2..b744f2510 100644
--- a/glib/gutils.c
+++ b/glib/gutils.c
@@ -2235,9 +2235,9 @@ g_reload_user_special_dirs_cache (void)
  * of the special directory without requiring the session to restart; GLib
  * will not reflect any change once the special directories are loaded.
  *
- * Returns: (type filename): the path to the specified special directory, or
- *   %NULL if the logical id was not found. The returned string is owned by
- *   GLib and should not be modified or freed.
+ * Returns: (type filename) (nullable): the path to the specified special
+ *   directory, or %NULL if the logical id was not found. The returned string is
+ *   owned by GLib and should not be modified or freed.
  *
  * Since: 2.14
  */