diff --git a/apps/wpm/views.py b/apps/wpm/views.py
index f70758ec..0d4b0c55 100644
--- a/apps/wpm/views.py
+++ b/apps/wpm/views.py
@@ -532,7 +532,6 @@ class MlogbInViewSet(CreateModelMixin, UpdateModelMixin, DestroyModelMixin, Cust
     perms_map = {'post': 'mlog.update', 'delete': 'mlog.update', 'put': 'mlog.update'}
     queryset = Mlogb.objects.filter(material_in__isnull=False)
     serializer_class = MlogbInSerializer
-    update_serializer_class = MlogbInUpdateSerializer
 
     @transaction.atomic
     def perform_destroy(self, instance):