diff --git a/addons/hr_holidays/models/hr_leave.py b/addons/hr_holidays/models/hr_leave.py
index bcd2845052d..e13de639204 100644
--- a/addons/hr_holidays/models/hr_leave.py
+++ b/addons/hr_holidays/models/hr_leave.py
@@ -83,6 +83,7 @@ class HolidaysRequest(models.Model):
 
             if lt:
                 defaults['holiday_status_id'] = lt.id
+                defaults['request_unit_custom'] = False
 
         if 'state' in fields_list and not defaults.get('state'):
             lt = self.env['hr.leave.type'].browse(defaults.get('holiday_status_id'))