diff --git a/src/Model/GlobalContact.php b/src/Model/GlobalContact.php
index 21ac0d60e..639c8272d 100644
--- a/src/Model/GlobalContact.php
+++ b/src/Model/GlobalContact.php
@@ -7,6 +7,7 @@ namespace Friendica\Model;
 
 use Friendica\Core\Config;
 use Friendica\Core\System;
+use Friendica\Core\Worker;
 use Friendica\Database\DBM;
 use Friendica\Network\Probe;
 use Friendica\Protocol\PortableContact;