diff --git a/SoObjects/SOGo/SOGoPermissions.h b/SoObjects/SOGo/SOGoPermissions.h
index ee196174a..5f0e51cce 100644
--- a/SoObjects/SOGo/SOGoPermissions.h
+++ b/SoObjects/SOGo/SOGoPermissions.h
@@ -36,4 +36,7 @@ extern NSString *SOGoPerm_ReadAcls;
 extern NSString *SOGoPerm_CreateAndModifyAcls;
 extern NSString *SOGoPerm_FreeBusyLookup;
 
+extern NSString *SOGoRole_Organizer;
+extern NSString *SOGoRole_Participant;
+
 #endif /* SOGOPERMISSIONS_H */
diff --git a/SoObjects/SOGo/SOGoPermissions.m b/SoObjects/SOGo/SOGoPermissions.m
index 13e7cb9c6..1b856bb26 100644
--- a/SoObjects/SOGo/SOGoPermissions.m
+++ b/SoObjects/SOGo/SOGoPermissions.m
@@ -34,6 +34,10 @@ NSString *SOGoRole_FreeBusyLookup = @"FreeBusyLookup"; /* for users that have
 NSString *SOGoRole_FreeBusy = @"FreeBusy"; /* for the "freebusy" special user
                                             */
 
+/* Calendar */
+NSString *SOGoRole_Organizer = @"Organizer";
+NSString *SOGoRole_Participant = @"Participant";
+
 #warning ReadAcls still not used...
 NSString *SOGoPerm_ReadAcls = @"ReadAcls"; /* the equivalent of "read-acl" in
                                               the WebDAV acls spec, which is