diff --git a/account_journal_report_xls/wizard/print_journal_wizard.py b/account_journal_report_xls/wizard/print_journal_wizard.py
index 45fadc43..75216164 100644
--- a/account_journal_report_xls/wizard/print_journal_wizard.py
+++ b/account_journal_report_xls/wizard/print_journal_wizard.py
@@ -102,14 +102,14 @@ class account_print_journal_xls(orm.TransientModel):
                        "WHERE ap.date_start>=%s AND ap.date_stop<=%s AND company_id=%s "
                        "ORDER BY date_start, special DESC",
                        (period_from.date_start, period_to.date_stop, company_id))
-            wiz_period_ids = [x[0] for x in cr.fetchall()]
+            wiz_period_ids = map(lambda x: x[0], cr.fetchall())
         wiz_journal_ids = [j.id for j in wiz_form.journal_ids]
 
         # sort journals
         cr.execute('SELECT id FROM account_journal '
                    'WHERE id IN %s ORDER BY type DESC',
                    (tuple(wiz_journal_ids),))
-        wiz_journal_ids = [x[0] for x in cr.fetchall()]
+        wiz_journal_ids = map(lambda x: x[0], cr.fetchall())
 
         datas = {
             'model': 'account.journal',