diff --git a/addons/hr_attendance/models/hr_employee.py b/addons/hr_attendance/models/hr_employee.py
index 064278e0b2c..8dd238df67d 100644
--- a/addons/hr_attendance/models/hr_employee.py
+++ b/addons/hr_attendance/models/hr_employee.py
@@ -101,7 +101,7 @@ class HrEmployee(models.Model):
             hours = sum(
                 att.worked_hours or 0
                 for att in employee.attendance_ids.filtered(
-                    lambda att: att.check_in >= start_naive and att.check_out <= end_naive
+                    lambda att: att.check_in >= start_naive and att.check_out and att.check_out <= end_naive
                 )
             )