diff --git a/library/calendar_sync.py b/library/calendar_sync.py
index 12e003e..70c3947 100644
--- a/library/calendar_sync.py
+++ b/library/calendar_sync.py
@@ -53,10 +53,13 @@ def sync_ics_to_caldav(module):
 
     existing_events = {}
     for event in target_cal.events():
-        if not event or not event.data:
+        if event is None:
             continue
         try:
-            for calendar in vobject.readComponents(event.data):
+            data = getattr(event, 'data', None)
+            if not data:
+                continue
+            for calendar in vobject.readComponents(data):
                 for component in calendar.components():
                     if component.name == 'VEVENT' and hasattr(component, "uid"):
                         uid = str(component.uid)