diff --git a/djangorestframework/permissions.py b/djangorestframework/permissions.py
index aad013b25..b350d29bf 100644
--- a/djangorestframework/permissions.py
+++ b/djangorestframework/permissions.py
@@ -13,6 +13,7 @@ __all__ = (
     'BasePermission',
     'FullAnonAccess',
     'IsAuthenticated',
+    'IsModelInstanceOwnerOrIsAnonReadOnly',
     'IsAdminUser',
     'IsUserOrIsAnonReadOnly',
     'PerUserThrottling',
diff --git a/djangorestframework/serializer.py b/djangorestframework/serializer.py
index 71c0d93ae..e45e583b6 100644
--- a/djangorestframework/serializer.py
+++ b/djangorestframework/serializer.py
@@ -211,6 +211,7 @@ class Serializer(object):
         raise _SkipField
 
     def serialize_model(self, instance):
+        print 'sdfff',self, instance
         """
         Given a model instance or dict, serialize it to a dict..
         """