diff --git a/addons/account/account_bank_statement.py b/addons/account/account_bank_statement.py
index b4ccea8ba20..4a9c1127410 100644
--- a/addons/account/account_bank_statement.py
+++ b/addons/account/account_bank_statement.py
@@ -20,6 +20,7 @@
 ##############################################################################
 
 from openerp.osv import fields, osv
+from openerp.tools import float_is_zero
 from openerp.tools.translate import _
 import openerp.addons.decimal_precision as dp
 from openerp.report import report_sxw
@@ -793,8 +794,13 @@ class account_bank_statement_line(osv.osv):
                 if mv_line_dict.get('counterpart_move_line_id'):
                     #post an account line that use the same currency rate than the counterpart (to balance the account) and post the difference in another line
                     ctx['date'] = mv_line.date
-                    debit_at_old_rate = currency_obj.compute(cr, uid, st_line_currency.id, company_currency.id, mv_line_dict['debit'], context=ctx)
-                    credit_at_old_rate = currency_obj.compute(cr, uid, st_line_currency.id, company_currency.id, mv_line_dict['credit'], context=ctx)
+                    if mv_line.currency_id.id == mv_line_dict['currency_id'] \
+                            and float_is_zero(mv_line.amount_currency - abs(mv_line_dict['amount_currency']), precision_rounding=mv_line.currency_id.rounding):
+                        debit_at_old_rate = mv_line.credit
+                        credit_at_old_rate = mv_line.debit
+                    else:
+                        debit_at_old_rate = currency_obj.compute(cr, uid, st_line_currency.id, company_currency.id, mv_line_dict['debit'], context=ctx)
+                        credit_at_old_rate = currency_obj.compute(cr, uid, st_line_currency.id, company_currency.id, mv_line_dict['credit'], context=ctx)
                     mv_line_dict['credit'] = credit_at_old_rate
                     mv_line_dict['debit'] = debit_at_old_rate
                     if debit_at_old_rate - debit_at_current_rate: