diff --git a/src/wp-includes/class-wp-meta-query.php b/src/wp-includes/class-wp-meta-query.php
index ddafc6181b..affb83af64 100644
--- a/src/wp-includes/class-wp-meta-query.php
+++ b/src/wp-includes/class-wp-meta-query.php
@@ -114,8 +114,8 @@ class WP_Meta_Query {
 	 * @access public
 	 *
 	 * @param array $meta_query {
-	 *     Array of meta query clauses. When first-order clauses use strings as their array keys, they may be
-	 *     referenced in the 'orderby' parameter of the parent query.
+	 *     Array of meta query clauses. When first-order clauses or sub-clauses use strings as
+	 *     their array keys, they may be referenced in the 'orderby' parameter of the parent query.
 	 *
 	 *     @type string $relation Optional. The MySQL keyword used to join
 	 *                            the clauses of the query. Accepts 'AND', or 'OR'. Default 'AND'.