diff --git a/addons/hr_timesheet/controllers/portal.py b/addons/hr_timesheet/controllers/portal.py
index 8cc54671206..1b3d987b57c 100644
--- a/addons/hr_timesheet/controllers/portal.py
+++ b/addons/hr_timesheet/controllers/portal.py
@@ -138,7 +138,7 @@ class TimesheetCustomerPortal(CustomerPortal):
             if field:
                 if groupby == 'date':
                     raw_timesheets_group = Timesheet_sudo._read_group(
-                        domain, ['date:day'], ['unit_amount:sum', 'id:array_agg']
+                        domain, ['date:day'], ['unit_amount:sum', 'id:recordset']
                     )
                     grouped_timesheets = [(records, unit_amount) for __, unit_amount, records in raw_timesheets_group]