diff --git a/addons/account/res_currency.py b/addons/account/res_currency.py
index 8c9c6a8b103..6381ca258de 100644
--- a/addons/account/res_currency.py
+++ b/addons/account/res_currency.py
@@ -25,6 +25,11 @@ from osv import osv
 class res_currency_account(osv.osv):
     _inherit = "res.currency"
 
+    def get_conversion_rate(self, cr, uid, from_currency, to_currency, context=None):
+        if context is None:
+            context = {}
+        return self._get_conversion_rate(cr, uid, from_currency, to_currency, context=context)
+
     def _get_conversion_rate(self, cr, uid, from_currency, to_currency, context=None):
         if context is None:
             context = {}
@@ -44,4 +49,4 @@ class res_currency_account(osv.osv):
 
 res_currency_account()
 
-# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
\ No newline at end of file
+# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: