diff --git a/addons/hr_timesheet_sheet/hr_timesheet_sheet.py b/addons/hr_timesheet_sheet/hr_timesheet_sheet.py
index 3a4c4e5e29d..34134942e0a 100644
--- a/addons/hr_timesheet_sheet/hr_timesheet_sheet.py
+++ b/addons/hr_timesheet_sheet/hr_timesheet_sheet.py
@@ -269,7 +269,7 @@ class hr_timesheet_sheet(osv.osv):
                 'draft': [('readonly', False)],
                 'new': [('readonly', False)]}
             ),
-        'attendances_ids' : one2many_mod2('hr.attendance', 'sheet_id', 'Attendances', readonly=True,),
+        'attendances_ids' : one2many_mod2('hr.attendance', 'sheet_id', 'Attendances'),
         'state' : fields.selection([
             ('new', 'New'),
             ('draft','Draft'),