diff --git a/keystone/common/utils.py b/keystone/common/utils.py
index da40d4db4c..f71b40b491 100644
--- a/keystone/common/utils.py
+++ b/keystone/common/utils.py
@@ -94,8 +94,8 @@ class SmarterEncoder(jsonutils.json.JSONEncoder):
     """Help for JSON encoding dict-like objects."""
 
     def default(self, obj):
-        if not isinstance(obj, dict) and hasattr(obj, 'iteritems'):
-            return dict(obj.iteritems())
+        if not isinstance(obj, dict) and hasattr(obj, 'items'):
+            return dict(obj.items())
         return super(SmarterEncoder, self).default(obj)