diff --git a/addons/account_voucher/account_voucher.py b/addons/account_voucher/account_voucher.py
index d6869e1f7dd..768052a9b66 100644
--- a/addons/account_voucher/account_voucher.py
+++ b/addons/account_voucher/account_voucher.py
@@ -1619,7 +1619,11 @@ class account_bank_statement(osv.osv):
         bank_st_line_obj = self.pool.get('account.bank.statement.line')
         st_line = bank_st_line_obj.browse(cr, uid, st_line_id, context=context)
         if st_line.voucher_id:
-            voucher_obj.write(cr, uid, [st_line.voucher_id.id], {'number': next_number}, context=context)
+            voucher_obj.write(cr, uid, [st_line.voucher_id.id],
+                            {'number': next_number,
+                            'date': st_line.date,
+                            'period_id': st_line.statement_id.period_id.id},
+                            context=context)
             if st_line.voucher_id.state == 'cancel':
                 voucher_obj.action_cancel_draft(cr, uid, [st_line.voucher_id.id], context=context)
             wf_service.trg_validate(uid, 'account.voucher', st_line.voucher_id.id, 'proforma_voucher', cr)