diff --git a/Classes/Middleware/JumpurlController.php b/Classes/Middleware/JumpurlController.php
index ab52410ac..64fb82d70 100644
--- a/Classes/Middleware/JumpurlController.php
+++ b/Classes/Middleware/JumpurlController.php
@@ -85,7 +85,7 @@ public function process(ServerRequestInterface $request, RequestHandlerInterface
 
         if ($this->shouldProcess()) {
             $mailId = (int)$this->request->getQueryParams()['mid'];
-            $submittedRecipient = (string)$this->request->getQueryParams()['rid'];
+            $submittedRecipient = isset($this->request->getQueryParams()['rid']) ? (string)$this->request->getQueryParams()['rid'] : '';
             $submittedAuthCode  = $this->request->getQueryParams()['aC'];
             $jumpurl = $this->request->getQueryParams()['jumpurl'];