diff --git a/openerp/addons/base/ir/ir_ui_menu.py b/openerp/addons/base/ir/ir_ui_menu.py
index 843c8dd64b0..1db4527362e 100644
--- a/openerp/addons/base/ir/ir_ui_menu.py
+++ b/openerp/addons/base/ir/ir_ui_menu.py
@@ -42,7 +42,7 @@ class ir_ui_menu(osv.osv):
 
     def __init__(self, *args, **kwargs):
         self.cache_lock = threading.RLock()
-        self.clear_cache()
+        self._cache = {}
         r = super(ir_ui_menu, self).__init__(*args, **kwargs)
         self.pool.get('ir.model.access').register_cache_clearing_method(self._name, 'clear_cache')
         return r