diff --git a/src/pretix/api/views/checkin.py b/src/pretix/api/views/checkin.py
index 75c98bc4a..73ca94027 100644
--- a/src/pretix/api/views/checkin.py
+++ b/src/pretix/api/views/checkin.py
@@ -259,12 +259,10 @@ class CheckinListPositionViewSet(viewsets.ReadOnlyModelViewSet):
             return Response({
                 'status': 'error',
                 'reason': e.code,
-                'data': OrderPositionSerializer(op).data
             }, status=400)
         else:
             return Response({
                 'status': 'ok',
-                'data': OrderPositionSerializer(op).data
             }, status=201)
 
     def get_object(self):