diff --git a/addons/account/account.py b/addons/account/account.py
index f6dd36c01fc..07ff993694a 100644
--- a/addons/account/account.py
+++ b/addons/account/account.py
@@ -2473,7 +2473,7 @@ class account_tax_template(osv.osv):
         'name': fields.char('Tax Name', size=64, required=True),
         'sequence': fields.integer('Sequence', required=True, help="The sequence field is used to order the taxes lines from lower sequences to higher ones. The order is important if you have a tax that has several tax children. In this case, the evaluation order is important."),
         'amount': fields.float('Amount', required=True, digits=(14,4), help="For Tax Type percent enter % ratio between 0-1."),
-        'type': fields.selection( [('percent','Percent'), ('fixed','Fixed'), ('none','None'), ('code','Python Code')], 'Tax Type', required=True),
+        'type': fields.selection( [('percent','Percent'), ('fixed','Fixed'), ('none','None'), ('code','Python Code'), ('balance','Balance')], 'Tax Type', required=True),
         'applicable_type': fields.selection( [('true','True'), ('code','Python Code')], 'Applicable Type', required=True, help="If not applicable (computed through a Python code), the tax won't appear on the invoice."),
         'domain':fields.char('Domain', size=32, help="This field is only used if you develop your own module allowing developers to create specific taxes in a custom domain."),
         'account_collected_id':fields.many2one('account.account.template', 'Invoice Tax Account'),