diff --git a/gio/gsettings.c b/gio/gsettings.c
index 801f57060..4878645da 100644
--- a/gio/gsettings.c
+++ b/gio/gsettings.c
@@ -1788,6 +1788,7 @@ g_settings_set_boolean (GSettings  *settings,
  * g_settings_get_strv:
  * @settings: a #GSettings object
  * @key: the key to get the value for
+ * @length: return location for the length of the result, or %NULL
  * @returns: a newly-allocated, %NULL-terminated array of strings
  *
  * Gets the value that is stored at @key in @settings.
@@ -1819,6 +1820,7 @@ g_settings_get_strv (GSettings   *settings,
  * @settings: a #GSettings object
  * @key: the name of the key to set
  * @value: the value to set it to
+ * @length: the length of the @value array, or -1
  * @returns: %TRUE if setting the key succeeded,
  *     %FALSE if the key was not writable
  *