diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 6e3cd07..f494c56 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -4359,6 +4359,7 @@ function complete_user_login($user) {
             if ($changeurl = $userauth->change_password_url()) {
                 redirect($changeurl);
             } else {
+               require_once($CFG->dirroot.'/login/lib.php');
                 $SESSION->wantsurl = core_login_get_return_url();
                 redirect($CFG->httpswwwroot.'/login/change_password.php');
             }