diff --git a/gio/gsocketaddressenumerator.c b/gio/gsocketaddressenumerator.c
index 1cd2f0e55..2f6751848 100644
--- a/gio/gsocketaddressenumerator.c
+++ b/gio/gsocketaddressenumerator.c
@@ -87,7 +87,7 @@ g_socket_address_enumerator_class_init (GSocketAddressEnumeratorClass *enumerato
  * internal errors (other than @cancellable being triggered) will be
  * ignored.
  *
- * Returns: (transfer full): a #GSocketAddress (owned by the caller), or %NULL on
+ * Returns: (transfer full) (nullable): a #GSocketAddress (owned by the caller), or %NULL on
  *     error (in which case *@error will be set) or if there are no
  *     more addresses.
  */
@@ -181,7 +181,7 @@ g_socket_address_enumerator_real_next_finish (GSocketAddressEnumerator  *enumera
  * g_socket_address_enumerator_next() for more information about
  * error handling.
  *
- * Returns: (transfer full): a #GSocketAddress (owned by the caller), or %NULL on
+ * Returns: (transfer full) (nullable): a #GSocketAddress (owned by the caller), or %NULL on
  *     error (in which case *@error will be set) or if there are no
  *     more addresses.
  */