diff --git a/apps/pm/views.py b/apps/pm/views.py
index 93b03a54..bc56e17c 100644
--- a/apps/pm/views.py
+++ b/apps/pm/views.py
@@ -211,5 +211,5 @@ class MtaskbViewSet(CustomModelViewSet):
     queryset = Mtaskb.objects.all()
     serializer_class = MtaskbSerializer
     update_serializer_class = MtaskbUpdateSerializer
-    filterset_fields = {"mtask": ["exact"], "handle_user": ["exact"], "mgroup": ["exact"]}
+    filterset_fields = {"mtask": ["exact"], "handle_user": ["exact"], "mtask__mgroup": ["exact"]}
     ordering = ['id']
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