diff --git a/auth/oauth2/classes/auth.php b/auth/oauth2/classes/auth.php
index 448c00ea6c7..1d1ff6fc14c 100644
--- a/auth/oauth2/classes/auth.php
+++ b/auth/oauth2/classes/auth.php
@@ -36,6 +36,7 @@ use core\oauth2\client;
 
 require_once($CFG->libdir.'/authlib.php');
 require_once($CFG->dirroot.'/user/lib.php');
+require_once($CFG->dirroot.'/user/profile/lib.php');
 
 /**
  * Plugin for oauth2 authentication.