diff --git a/actions/accesstoken.php b/actions/accesstoken.php
index dc6736e87d..1c1db8fbc4 100644
--- a/actions/accesstoken.php
+++ b/actions/accesstoken.php
@@ -19,6 +19,8 @@
 
 if (!defined('LACONICA')) { exit(1); }
 
+require_once(INSTALLDIR.'/lib/omb.php');
+
 class AccesstokenAction extends Action {
 	function handle($args) {
 		parent::handle($args);