diff --git a/safesite/services.py b/safesite/services.py
index 0f0a2b92..986843dc 100644
--- a/safesite/services.py
+++ b/safesite/services.py
@@ -36,11 +36,15 @@ def correct_myschedule():
         elif typeset == 'crontab':
             try:
                 crontab = item.crontab
-                item.name = get_chinese_description(typeset,
-                {"minute": crontab.minute, "hour": crontab.hour, "day_of_month": crontab.day_of_month, 
-                "month_of_year": crontab.month_of_year, "day_of_week": crontab.day_of_week})
-                if item.name == '':
-                    crontab.delete()
+                if crontab:
+                    item.name = get_chinese_description(typeset,
+                    {"minute": crontab.minute, "hour": crontab.hour, "day_of_month": crontab.day_of_month, 
+                    "month_of_year": crontab.month_of_year, "day_of_week": crontab.day_of_week})
+                    if item.name == '':
+                        crontab.delete()
+                        item.delete()
+                else:
+                    PeriodicTask.objects.filter(gridtaskset_periodictask__myschedule=item).delete()
                     item.delete()
             except ObjectDoesNotExist:
                 GridTaskSet.objects.filter(myschedule=item).delete()