diff --git a/apps/enm/tasks.py b/apps/enm/tasks.py
index 9c1a5735..70aba207 100644
--- a/apps/enm/tasks.py
+++ b/apps/enm/tasks.py
@@ -501,7 +501,7 @@ def cal_enstat(type, sflogId, mgroupId, year, month, day, hour, year_s, month_s,
             enstat.run_hour = enstat.total_hour_now - enstat.shut_hour
             try:
                 enstat.run_rate = (enstat.run_hour / enstat.total_hour_now) * 100
-                enstat.production_hour = enstat.total_production / enstat.total_hour_now
+                enstat.production_hour = enstat.total_production / enstat.run_hour
             except ZeroDivisionError:
                 pass
             enstat.save()