diff --git a/addons/account_voucher/account_voucher.py b/addons/account_voucher/account_voucher.py
index e531243da88..30358f701ef 100644
--- a/addons/account_voucher/account_voucher.py
+++ b/addons/account_voucher/account_voucher.py
@@ -957,11 +957,11 @@ class account_voucher(osv.osv):
         if amount_residual > 0:
             account_id = line.voucher_id.company_id.expense_currency_exchange_account_id
             if not account_id:
-                raise osv.except_osv(_('Warning!'),_("First you have to configure the 'Income Currency Rate' on the company, then create accounting entry for currency rate difference."))
+                raise osv.except_osv(_('Warning!'),_("First you have to configure the 'Expense Currency Rate' on the company, then create accounting entry for currency rate difference."))
         else:
             account_id = line.voucher_id.company_id.income_currency_exchange_account_id
             if not account_id:
-                raise osv.except_osv(_('Warning!'),_("First you have to configure the 'Expense Currency Rate' on the company, then create accounting entry for currency rate difference."))
+                raise osv.except_osv(_('Warning!'),_("First you have to configure the 'Income Currency Rate' on the company, then create accounting entry for currency rate difference."))
         # Even if the amount_currency is never filled, we need to pass the foreign currency because otherwise
         # the receivable/payable account may have a secondary currency, which render this field mandatory
         account_currency_id = company_currency <> current_currency and current_currency or False