diff --git a/openerp/addons/base/res/res_currency.py b/openerp/addons/base/res/res_currency.py
index 22b2187065c..cafbe4c0f4f 100644
--- a/openerp/addons/base/res/res_currency.py
+++ b/openerp/addons/base/res/res_currency.py
@@ -22,6 +22,7 @@ import time
 import netsvc
 from osv import fields, osv
 import ir
+import tools
 
 from tools.misc import currency
 from tools.translate import _