diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
index 19fdbbfd68..dce925a677 100644
--- a/src/wp-includes/functions.php
+++ b/src/wp-includes/functions.php
@@ -803,7 +803,7 @@ function add_query_arg() {
  * @since 1.5.0
  *
  * @param string|array $key   Query key or keys to remove.
- * @param bool         $query Optional. When false uses the $_SERVER value. Default false.
+ * @param bool|string  $query Optional. When false uses the $_SERVER value. Default false.
  * @return string New URL query string.
  */
 function remove_query_arg( $key, $query = false ) {