diff --git a/addons/point_of_sale/point_of_sale.py b/addons/point_of_sale/point_of_sale.py
index b5b0763714d..756da2bb47b 100644
--- a/addons/point_of_sale/point_of_sale.py
+++ b/addons/point_of_sale/point_of_sale.py
@@ -909,6 +909,7 @@ class pos_order(osv.osv):
         account_tax_obj = self.pool.get('account.tax')
         user_proxy = self.pool.get('res.users')
         property_obj = self.pool.get('ir.property')
+        cur_obj = self.pool.get('res.currency')
 
         period = account_period_obj.find(cr, uid, context=context)[0]
 
@@ -1010,11 +1011,11 @@ class pos_order(osv.osv):
                 computed_taxes = account_tax_obj.compute_all(cr, uid, taxes, line.price_unit * (100.0-line.discount) / 100.0, line.qty)['taxes']
 
                 for tax in computed_taxes:
-                    tax_amount += round(tax['amount'], 2)
+                    tax_amount += cur_obj.round(cr, uid, cur, tax['amount'])
                     group_key = (tax['tax_code_id'], tax['base_code_id'], tax['account_collected_id'], tax['id'])
 
                     group_tax.setdefault(group_key, 0)
-                    group_tax[group_key] += round(tax['amount'], 2)
+                    group_tax[group_key] += cur_obj.round(cr, uid, cur, tax['amount'])
 
                 amount = line.price_subtotal