diff --git a/giarginfo.c b/giarginfo.c
index 069ecce0e..0d1f0bbf6 100644
--- a/giarginfo.c
+++ b/giarginfo.c
@@ -171,6 +171,7 @@ g_arg_info_may_be_null (GIArgInfo *info)
  * Obtain if an argument is only useful in C.
  *
  * Returns: %TRUE if argument is only useful in C.
+ * Since: 1.29.0
  */
 gboolean
 g_arg_info_is_skip (GIArgInfo *info)