diff --git a/packages/ep_products/Classes/Domain/Serialization/Hotel.php b/packages/ep_products/Classes/Domain/Serialization/Hotel.php
index 9de9509..5296649 100644
--- a/packages/ep_products/Classes/Domain/Serialization/Hotel.php
+++ b/packages/ep_products/Classes/Domain/Serialization/Hotel.php
@@ -44,7 +44,7 @@ class Hotel
         $hotel['@id'] = $entity->getUid();
         $hotel['@code'] = $entity->getCode();
         $hotel['name'] = $entity->getName();
-        $hotel['category'] = \EP\EpProducts\Domain\Model\Hotel::$categoryLabels[$entity->getCategory()];
+        $hotel['category'] = \EP\EpProducts\Domain\Model\Hotel::$categoryLabels[$entity->getCategory()] ?? null;
         $hotel['type'] = \EP\EpProducts\Domain\Model\Hotel::$typeLabels[$entity->getType()];
         $hotel['description'] = SerializationUtility::sanitizeText($entity->getDescription());
         $hotel['roomtypes'] = SerializationUtility::sanitizeText($entity->getRoomTypes());
diff --git a/packages/ep_products/Classes/Service/ProductDataService.php b/packages/ep_products/Classes/Service/ProductDataService.php
index f8085cc..f0f5375 100644
--- a/packages/ep_products/Classes/Service/ProductDataService.php
+++ b/packages/ep_products/Classes/Service/ProductDataService.php
@@ -156,7 +156,7 @@ class ProductDataService implements SingletonInterface
             }
 
             if (!array_key_exists($row['hotelCategory'], $teaser['hotelCategories'])) {
-                $teaser['hotelCategories'][$row['hotelCategory']] = Hotel::$categoryLabels[$row['hotelCategory']];
+                $teaser['hotelCategories'][$row['hotelCategory']] = Hotel::$categoryLabels[$row['hotelCategory']] ?? null;
                 ksort($teaser['hotelCategories']);
             }
         }