diff --git a/yuthon_hr_attendance/models/hr_attendance_detail_wechat.py b/yuthon_hr_attendance/models/hr_attendance_detail_wechat.py
index 6d7f92359..9cc656444 100644
--- a/yuthon_hr_attendance/models/hr_attendance_detail_wechat.py
+++ b/yuthon_hr_attendance/models/hr_attendance_detail_wechat.py
@@ -139,7 +139,7 @@ class HrAttendanceDetail(models.Model):
                 checkin_times = sorted(attendance_records.mapped('checkin_time'))
                 check_in = checkin_times[0]
                 if len(checkin_times) == 1:
-                    check_out = 0
+                    check_out = None
                 else:
                     check_out = checkin_times[-1]
             if check_in is not None: