diff --git a/src/wp-admin/includes/theme.php b/src/wp-admin/includes/theme.php
index 177eb44cf9..020927a154 100644
--- a/src/wp-admin/includes/theme.php
+++ b/src/wp-admin/includes/theme.php
@@ -442,7 +442,7 @@ function get_theme_feature_list( $api = true ) {
  * @param string       $action API action to perform: 'query_themes', 'theme_information',
  *                             'hot_tags' or 'feature_list'.
  * @param array|object $args   {
- *     Optional. Array or object of arguments to serialize for the Themes API.
+ *     Optional. Array or object of arguments to serialize for the Themes API. Default empty array.
  *
  *     @type string  $slug     The theme slug. Default empty.
  *     @type int     $per_page Number of themes per page. Default 24.