diff --git a/product/ERP5Type/Tool/MemcachedTool.py b/product/ERP5Type/Tool/MemcachedTool.py
index 4b6d8be01f5138049be778098ad7ca125412758f..855b332a6945a5e5a3381fe9aaa676d0cfb169b3 100644
--- a/product/ERP5Type/Tool/MemcachedTool.py
+++ b/product/ERP5Type/Tool/MemcachedTool.py
@@ -215,7 +215,7 @@ if memcache is not None:
       except KeyError:
         return default
 
-  class SharedDict:
+  class SharedDict(object):
     """
       Class to make possible for multiple "users" to store data in the same
       dictionary without risking to overwrite other's data.