diff --git a/gio/gfileinfo.c b/gio/gfileinfo.c
index fa53a9c49..420e46d56 100644
--- a/gio/gfileinfo.c
+++ b/gio/gfileinfo.c
@@ -1180,7 +1180,8 @@ _g_file_info_set_attribute_stringv_by_id (GFileInfo *info,
  * g_file_info_set_attribute_stringv:
  * @info: a #GFileInfo.
  * @attribute: a file attribute key
- * @attr_value: (array) (element-type utf8): a %NULL terminated array of UTF-8 strings.
+ * @attr_value: (array zero-terminated=1) (element-type utf8): a %NULL
+ *   terminated array of UTF-8 strings.
  *
  * Sets the @attribute to contain the given @attr_value,
  * if possible.