diff --git a/graphene_django/types.py b/graphene_django/types.py
index 144f717..d9833cd 100644
--- a/graphene_django/types.py
+++ b/graphene_django/types.py
@@ -126,9 +126,7 @@ class DjangoObjectType(ObjectType):
             return True
         if not is_valid_neomodel_model(type(root)):
             raise Exception(('Received incompatible instance "{}".').format(root))
-
-        model = root._meta.model
-        return model == cls._meta.model
+        return root == cls._meta.model
 
     @classmethod
     def get_node(cls, info, id):