diff --git a/account_financial_report_qweb/wizard/ledger_report_wizard.py b/account_financial_report_qweb/wizard/ledger_report_wizard.py
index 27b78f68..24b707cd 100644
--- a/account_financial_report_qweb/wizard/ledger_report_wizard.py
+++ b/account_financial_report_qweb/wizard/ledger_report_wizard.py
@@ -141,7 +141,7 @@ class LedgerReportWizard(models.TransientModel):
             'view_mode': 'tree',
             'res_model': 'ledger.report.wizard.line',
             'view_id': False,
-            'context': {'group_by': ['account_id']},
+            'context': {'group_by': ['account_id', 'date:month']},
             'type': 'ir.actions.act_window'
         }