diff --git a/mailinglistsync.php b/mailinglistsync.php
index 4f5f6d1..9850ef5 100644
--- a/mailinglistsync.php
+++ b/mailinglistsync.php
@@ -223,7 +223,7 @@ function mailinglistsync_civicrm_post(string $op, string $objectName, int $objec
         ->addWhere('id', '=', $objectId)
         ->execute()
         ->first()['event_id'];
-      $mailingList = new GroupMailingList($eventId);
+      $mailingList = new EventMailingList($eventId);
 
       // Check permission to alter event mailing list
       if ($mailingList->isEnabled() && !CRM_Core_Permission::check('manage_event_mailinglists')) {