diff --git a/RIGS/ical.py b/RIGS/ical.py
index 3940390b..bd3dfcba 100644
--- a/RIGS/ical.py
+++ b/RIGS/ical.py
@@ -102,7 +102,7 @@ class CalendarICS(ICalFeed):
         return item.earliest_time
 
     def item_end_datetime(self, item):
-        if isinstance(item.latest_time, datetime.date):  # Ical end_datetime is non-inclusive, so add a day
+        if type(item.latest_time) == datetime.date:  # Ical end_datetime is non-inclusive, so add a day
             return item.latest_time + datetime.timedelta(days=1)
 
         return item.latest_time