diff --git a/ChangeLog b/ChangeLog
index c303dd634..0159c67c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,9 @@
 
 2012-03-20  Wolfgang Sourdeau  <wsourdeau@inverse.ca>
 
+	* OpenChange/MAPIStoreAppointmentWrapper.m (-_setupITIPContext):
+	ensure method is uppercase.
+
 	* OpenChange/MAPIStoreCalendarMessage.m
 	(-getPidLidAppointmentSequence:inMemCtx:): new getter.
 	(-save): properly initialize CREATED, LAST-MODIFIED, DTSTAMP and
diff --git a/OpenChange/MAPIStoreAppointmentWrapper.m b/OpenChange/MAPIStoreAppointmentWrapper.m
index 76d5a0a30..b3eb8df02 100644
--- a/OpenChange/MAPIStoreAppointmentWrapper.m
+++ b/OpenChange/MAPIStoreAppointmentWrapper.m
@@ -162,6 +162,7 @@ static NSCharacterSet *hexCharacterSet = nil;
   method = [[event parent] method];
   if ([method length] > 0)
     {
+      method = [method uppercaseString];
       [method retain];
       if ([method isEqualToString: @"REPLY"])
         {