diff --git a/gibaseinfo.c b/gibaseinfo.c
index 5d9e5f37b..ced7674e2 100644
--- a/gibaseinfo.c
+++ b/gibaseinfo.c
@@ -558,7 +558,7 @@ _attribute_blob_find_first (GIBaseInfo *info,
 /**
  * g_base_info_iterate_attributes:
  * @info: a #GIBaseInfo
- * @iterator: a #GIAttributeIter structure, must be initialized; see below
+ * @iterator: (inout): a #GIAttributeIter structure, must be initialized; see below
  * @name: (out) (transfer none): Returned name, must not be freed
  * @value: (out) (transfer none): Returned name, must not be freed
  *
diff --git a/gicallableinfo.c b/gicallableinfo.c
index 27c7cb2f4..4ffb46ded 100644
--- a/gicallableinfo.c
+++ b/gicallableinfo.c
@@ -424,7 +424,7 @@ g_callable_info_get_return_attribute (GICallableInfo  *info,
 /**
  * g_callable_info_iterate_return_attributes:
  * @info: a #GICallableInfo
- * @iterator: a #GIAttributeIter structure, must be initialized; see below
+ * @iterator: (inout): a #GIAttributeIter structure, must be initialized; see below
  * @name: (out) (transfer none): Returned name, must not be freed
  * @value: (out) (transfer none): Returned name, must not be freed
  *