diff --git a/product/ERP5Type/Base.py b/product/ERP5Type/Base.py
index 7332a713cb536657e55a1325543959e6801b2729..67eb905f8039e01cc4f2d622eabda5e27de4b9f7 100644
--- a/product/ERP5Type/Base.py
+++ b/product/ERP5Type/Base.py
@@ -301,10 +301,6 @@ def _aq_reset():
   from Products.ERP5.ERP5Site import getSite
   getSite().portal_types.resetDynamicDocuments()
 
-global method_registration_cache
-method_registration_cache = {}
-
-
 class PropertyHolder(object):
   isRADContent = 1
   WORKFLOW_METHOD_MARKER = ('Base._doNothing',)