diff --git a/Classes/DirectMailUtility.php b/Classes/DirectMailUtility.php
index c27ce96aa..de7ae4b42 100644
--- a/Classes/DirectMailUtility.php
+++ b/Classes/DirectMailUtility.php
@@ -133,7 +133,7 @@ public static function fetchUrlContentsForDirectMailRecord(array $row, array $pa
             $htmlmail->setJumperURLPrefix(
                 $urls['baseUrl'] . $glue .
                 'mid=###SYS_MAIL_ID###' .
-                ((int)$params['jumpurl_tracking_privacy'] ? '' : '&rid=###SYS_TABLE_NAME###_###USER_uid###') .
+                (isset($params['jumpurl_tracking_privacy']) && (int)$params['jumpurl_tracking_privacy'] ? '' : '&rid=###SYS_TABLE_NAME###_###USER_uid###') .
                 '&aC=###SYS_AUTHCODE###' .
                 '&jumpurl='
             );