diff --git a/SoObjects/Appointments/SOGoCalendarComponent.m b/SoObjects/Appointments/SOGoCalendarComponent.m
index cfeca6c0c..762139774 100644
--- a/SoObjects/Appointments/SOGoCalendarComponent.m
+++ b/SoObjects/Appointments/SOGoCalendarComponent.m
@@ -140,14 +140,6 @@
   return aclManager;
 }
 
-- (NSException *) changeParticipationStatus: (NSString *) newPartStat
-                               withDelegate: (iCalPerson *) delegate
-                                      alarm: (iCalAlarm *) alarm
-{
-  // required for protocol <SOGoComponentOccurence>
-  return nil;
-}
-
 - (NSException *) changeParticipationStatus: (NSString *) newPartStat
                                withDelegate: (iCalPerson *) delegate
                                       alarm: (iCalAlarm *) alarm