diff --git a/glib/goption.c b/glib/goption.c
index 183e9d9d3..3520c11e6 100644
--- a/glib/goption.c
+++ b/glib/goption.c
@@ -640,7 +640,7 @@ g_option_context_get_main_group (GOptionContext *context)
 /**
  * g_option_context_add_main_entries:
  * @context: a #GOptionContext
- * @entries: a %NULL-terminated array of #GOptionEntrys
+ * @entries: (array zero-terminated=1): a %NULL-terminated array of #GOptionEntrys
  * @translation_domain: (nullable): a translation domain to use for translating
  *    the `--help` output for the options in @entries
  *    with gettext(), or %NULL
@@ -2392,7 +2392,7 @@ g_option_group_unref (GOptionGroup *group)
 /**
  * g_option_group_add_entries:
  * @group: a #GOptionGroup
- * @entries: a %NULL-terminated array of #GOptionEntrys
+ * @entries: (array zero-terminated=1): a %NULL-terminated array of #GOptionEntrys
  *
  * Adds the options specified in @entries to @group.
  *