diff --git a/addons/account/invoice.py b/addons/account/invoice.py
index e9484ff312d..77a96b3140e 100644
--- a/addons/account/invoice.py
+++ b/addons/account/invoice.py
@@ -899,14 +899,18 @@ class account_invoice(osv.osv):
         else:
             amount_currency = False
             currency_id = False
-            
+        
+        if invoice.type in ('in_invoice', 'in_refund'):
+            ref = invoice.reference
+        else:
+            ref = self._convert_ref(cr, uid, invoice.number)        
         # Pay attention to the sign for both debit/credit AND amount_currency
         l1 = {
             'debit': direction * pay_amount>0 and direction * pay_amount,
             'credit': direction * pay_amount<0 and - direction * pay_amount,
             'account_id': src_account_id,
             'partner_id': invoice.partner_id.id,
-            'ref':invoice.number,
+            'ref':ref,
             'date': date,
             'currency_id':currency_id,
             'amount_currency':amount_currency and direction * amount_currency or 0.0,
@@ -916,7 +920,7 @@ class account_invoice(osv.osv):
             'credit': direction * pay_amount>0 and direction * pay_amount,
             'account_id': pay_account_id,
             'partner_id': invoice.partner_id.id,
-            'ref':invoice.number,
+            'ref':ref,
             'date': date,
             'currency_id':currency_id,
             'amount_currency':amount_currency and - direction * amount_currency or 0.0,
@@ -928,7 +932,7 @@ class account_invoice(osv.osv):
         l2['name'] = name
 
         lines = [(0, 0, l1), (0, 0, l2)]
-        move = {'ref': invoice.number, 'line_id': lines, 'journal_id': pay_journal_id, 'period_id': period_id, 'date': date}
+        move = {'ref': ref, 'line_id': lines, 'journal_id': pay_journal_id, 'period_id': period_id, 'date': date}
         move_id = self.pool.get('account.move').create(cr, uid, move, context=context)
 
         line_ids = []