diff --git a/neutron/objects/base.py b/neutron/objects/base.py
index c8ac563a60b..da685a9c4af 100644
--- a/neutron/objects/base.py
+++ b/neutron/objects/base.py
@@ -429,7 +429,7 @@ class NeutronDbObject(NeutronObject):
         all_keys = itertools.chain([cls.primary_keys], cls.unique_keys)
         if not any(lookup_keys.issuperset(keys) for keys in all_keys):
             missing_keys = set(cls.primary_keys).difference(lookup_keys)
-            raise NeutronPrimaryKeyMissing(object_class=cls.__class__,
+            raise NeutronPrimaryKeyMissing(object_class=cls.__name__,
                                            missing_keys=missing_keys)
 
         with db_api.autonested_transaction(context.session):