diff --git a/addons/account/account_bank.py b/addons/account/account_bank.py
index ef146128a67..e44d2acd163 100644
--- a/addons/account/account_bank.py
+++ b/addons/account/account_bank.py
@@ -43,11 +43,15 @@ class bank(osv.osv):
         "Return the name to use when creating a bank journal"
         return (bank.bank_name or '') + ' ' + bank.acc_number
 
-    def _prepare_name_get(self, cr, uid, bank_type_obj, bank_obj, context=None):
-        """Add ability to have %(currency_name)s in the format_layout of
-        res.partner.bank.type"""
-        bank_obj._data[bank_obj.id]['currency_name'] = bank_obj.currency_id and bank_obj.currency_id.name or ''
-        return super(bank, self)._prepare_name_get(cr, uid, bank_type_obj, bank_obj, context=context)
+    def _prepare_name_get(self, cr, uid, bank_dicts, context=None):
+        """Add ability to have %(currency_name)s in the format_layout of res.partner.bank.type"""
+        currency_ids = list(set(data['currency_id'][0] for data in bank_dicts if data['currency_id']))
+        currencies = self.pool.get('res.currency').browse(cr, uid, currency_ids, context=context)
+        currency_name = dict((currency.id, currency.name) for currency in currencies)
+
+        for data in bank_dicts:
+            data['currency_name'] = data['currency_id'] and currency_name[data['currency_id'][0]] or ''
+        return super(bank, self)._prepare_name_get(cr, uid, bank_dicts, context=context)
 
     def post_write(self, cr, uid, ids, context={}):
         if isinstance(ids, (int, long)):