diff --git a/openerp/addons/base/res/res_currency.py b/openerp/addons/base/res/res_currency.py
index d81248a735d..33c719ba8a3 100644
--- a/openerp/addons/base/res/res_currency.py
+++ b/openerp/addons/base/res/res_currency.py
@@ -68,7 +68,7 @@ class res_currency(osv.osv):
     _order = "name"
 
     def read(self, cr, user, ids, fields=None, context=None, load='_classic_read'):
-        res=super(osv.osv, self).read(cr, user, ids, fields, context, load)
+        res = super(res_currency, self).read(cr, user, ids, fields, context, load)
         for r in res:
             if r.__contains__('rate_ids'):
                 rates=r['rate_ids']