diff --git a/addons/account/account_invoice.py b/addons/account/account_invoice.py
index cce7d22d673..e100e174498 100644
--- a/addons/account/account_invoice.py
+++ b/addons/account/account_invoice.py
@@ -1559,6 +1559,7 @@ class account_invoice_tax(osv.osv):
 
         for line in inv.invoice_line:
             for tax in tax_obj.compute_all(cr, uid, line.invoice_line_tax_id, (line.price_unit* (1-(line.discount or 0.0)/100.0)), line.quantity, inv.address_invoice_id.id, line.product_id, inv.partner_id)['taxes']:
+                tax['price_unit'] = cur_obj.round(cr, uid, cur, tax['price_unit'])
                 val={}
                 val['invoice_id'] = inv.id
                 val['name'] = tax['name']