diff --git a/auth.php b/auth.php
index ae5f4af..c51d618 100644
--- a/auth.php
+++ b/auth.php
@@ -67,7 +67,7 @@ class auth_plugin_link extends auth_plugin_base {
     /**
      * No password updates.
      */
-    public function user_update_password() {
+    public function user_update_password($user, $newpassword) {
         return false;
     }