diff --git a/addons/account/models/account_tax.py b/addons/account/models/account_tax.py
index 7f16d1894a5..be7f55979f0 100644
--- a/addons/account/models/account_tax.py
+++ b/addons/account/models/account_tax.py
@@ -214,7 +214,9 @@ class AccountTax(models.Model):
 
     @api.returns('self', lambda value: value.id)
     def copy(self, default=None):
-        default = dict(default or {}, name=_("%s (Copy)", self.name))
+        default = dict(default or {})
+        if 'name' not in default:
+            default['name'] = _("%s (Copy)") % self.name
         return super(AccountTax, self).copy(default=default)
 
     def name_get(self):