Index: src/wp-includes/ms-functions.php
===================================================================
--- src/wp-includes/ms-functions.php	(revision 41286)
+++ src/wp-includes/ms-functions.php	(working copy)
@@ -2207,11 +2207,10 @@
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $key
- * @param int    $user_id Optional. Defaults to current user.
  * @param int    $blog_id Optional. Defaults to current blog.
  * @return bool
  */
-function is_user_option_local( $key, $user_id = 0, $blog_id = 0 ) {
+function is_user_option_local( $key, $blog_id = 0 ) {
 	global $wpdb;
 
 	$current_user = wp_get_current_user();