diff --git a/addons/hr_payroll/models/hr_employee.py b/addons/hr_payroll/models/hr_employee.py
index 54a8edc235e..492bf19a5dd 100644
--- a/addons/hr_payroll/models/hr_employee.py
+++ b/addons/hr_payroll/models/hr_employee.py
@@ -2,6 +2,7 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from datetime import datetime
+from dateutil.relativedelta import relativedelta
 import pytz
 
 from odoo import api, fields, models
@@ -22,8 +23,8 @@ class HrEmployee(models.Model):
 
     @api.multi
     def generate_benefit(self, date_start, date_stop):
-        date_start = fields.Datetime.to_datetime(date_start)
-        date_stop = fields.Datetime.to_datetime(date_stop)
+        date_start = fields.Datetime.to_datetime(date_start) + relativedelta(hour=0, minute=0, second=0)
+        date_stop = fields.Datetime.to_datetime(date_stop) + relativedelta(hour=23, minute=59, second=59)
         attendance_type = self.env.ref('hr_payroll.benefit_type_attendance')
         vals_list = []