diff --git a/lib/classes/ConsultationMailer.php b/lib/classes/ConsultationMailer.php
index b9713dc55f9fe8a15da3ed7da805bf5aa23eed8b..b5e8628aa92ad827961f3d36138db285f01c9a96 100644
--- a/lib/classes/ConsultationMailer.php
+++ b/lib/classes/ConsultationMailer.php
@@ -97,7 +97,7 @@ class ConsultationMailer
     {
         self::sendMessage(
             $receiver,
-            $booking->slot,
+            $booking,
             sprintf(_('Grund des Termins bei %s bearbeitet'), $booking->slot->block->range_display),
             $booking->reason
         );