diff --git a/graphene/relay/types.py b/graphene/relay/types.py
index e3c38686..2ddf8da2 100644
--- a/graphene/relay/types.py
+++ b/graphene/relay/types.py
@@ -11,7 +11,7 @@ from graphene.core.fields import LazyNativeField
 from graphene.utils import memoize
 
 
-def get_node_type(schema, obj, info):
+def get_node_type(schema, obj, info=None):
     return obj.internal_type(schema)