diff --git a/SoObjects/Appointments/SOGoAppointmentObject.m b/SoObjects/Appointments/SOGoAppointmentObject.m
index acac8c257..1e906ba68 100644
--- a/SoObjects/Appointments/SOGoAppointmentObject.m
+++ b/SoObjects/Appointments/SOGoAppointmentObject.m
@@ -46,6 +46,7 @@
 #import <SOGo/SOGoPermissions.h>
 #import <SOGo/SOGoGroup.h>
 #import <SOGo/SOGoUser.h>
+#import <SOGo/SOGoDomainDefaults.h>
 #import <SOGo/SOGoWebDAVValue.h>
 #import <SOGo/WORequest+SOGo.h>