diff --git a/backend/app/DomainObjects/TicketPriceDomainObject.php b/backend/app/DomainObjects/TicketPriceDomainObject.php
index e4eb43fe..d2d312e9 100644
--- a/backend/app/DomainObjects/TicketPriceDomainObject.php
+++ b/backend/app/DomainObjects/TicketPriceDomainObject.php
@@ -102,7 +102,7 @@ public function setIsAvailable(?bool $isAvailable): TicketPriceDomainObject
         return $this;
     }
 
-    public function setOffSaleReason(?string $offSaleReason): TicketDomainObject
+    public function setOffSaleReason(?string $offSaleReason): TicketPriceDomainObject
     {
         $this->offSaleReason = $offSaleReason;