diff --git a/src/allmydata/web/directory.py b/src/allmydata/web/directory.py
index 88337c178..6130287b6 100644
--- a/src/allmydata/web/directory.py
+++ b/src/allmydata/web/directory.py
@@ -1294,7 +1294,7 @@ class DeepSizeResults(MultiFormatPage):
         return json.dumps(status)
 
 
-class DeepStatsResults(Resource):
+class DeepStatsResults(Resource, object):
     """
     Renders the results of a 'deep-stats' operation on a directory
     capability.