diff --git a/addons/account_voucher/wizard/account_statement_from_invoice.py b/addons/account_voucher/wizard/account_statement_from_invoice.py
index 41d3560e278..362cb516e7c 100644
--- a/addons/account_voucher/wizard/account_statement_from_invoice.py
+++ b/addons/account_voucher/wizard/account_statement_from_invoice.py
@@ -68,8 +68,12 @@ class account_statement_from_invoice_lines(osv.osv_memory):
                 amount = -line.credit
 
             if line.amount_currency:
-                amount = currency_obj.compute(cr, uid, line.currency_id.id,
-                    statement.currency.id, line.amount_currency, context=ctx)
+                if line.company_id.currency_id.id != statement.currency.id:
+                    # In the specific case where the company currency and the statement currency are the same
+                    # the debit/credit field already contains the amount in the right currency.
+                    # We therefore avoid to re-convert the amount in the currency, to prevent Gain/loss exchanges
+                    amount = currency_obj.compute(cr, uid, line.currency_id.id,
+                        statement.currency.id, line.amount_currency, context=ctx)
             elif (line.invoice and line.invoice.currency_id.id <> statement.currency.id):
                 amount = currency_obj.compute(cr, uid, line.invoice.currency_id.id,
                     statement.currency.id, amount, context=ctx)