diff --git a/Main/SOGo+DAV.m b/Main/SOGo+DAV.m
index 42d2725c1..41d4b64b5 100644
--- a/Main/SOGo+DAV.m
+++ b/Main/SOGo+DAV.m
@@ -550,8 +550,8 @@
       newClasses
         = [[super davComplianceClassesInContext: localContext] mutableCopy];
       selfClasses = [NSArray arrayWithObjects: @"access-control", @"addressbook",
-                         @"calendar-access", @"calendar-auto-schedule",
-                         @"calendar-schedule", nil];
+                             @"calendar-access", @"calendar-auto-schedule",
+                             @"calendar-schedule", @"calendar-proxy", nil];
       [newClasses addObjectsFromArray: selfClasses];
     }
 
diff --git a/SoObjects/SOGo/SOGoObject.m b/SoObjects/SOGo/SOGoObject.m
index fa062046c..1191ccdc2 100644
--- a/SoObjects/SOGo/SOGoObject.m
+++ b/SoObjects/SOGo/SOGoObject.m
@@ -1115,7 +1115,8 @@
         = [[super davComplianceClassesInContext: localContext] mutableCopy];
       selfClasses = [NSArray arrayWithObjects: @"access-control",
                              @"calendar-access", @"calendar-schedule",
-                             @"calendar-auto-schedule", nil];
+                             @"calendar-auto-schedule", @"calendar-proxy",
+                             nil];
       [newClasses addObjectsFromArray: selfClasses];
     }