diff --git a/graphene_django/utils.py b/graphene_django/utils.py
index 830af03..498524e 100644
--- a/graphene_django/utils.py
+++ b/graphene_django/utils.py
@@ -9,7 +9,7 @@ from neomodel import (
 # from graphene.utils import LazyList
 
 def is_parent_set(info):
-    if hasattr(info.parent_type._meta.graphene_type, 'know_parent_fields'):
+    if hasattr(info.parent_type.graphene_type._meta, 'know_parent_fields'):
         options = info.parent_type.graphene_type._meta.know_parent_fields
         assert isinstance(options, (list, tuple)), \
             "know_parent_fields should be list or tuple"