diff --git a/SoObjects/Appointments/SOGoAppointmentObject.m b/SoObjects/Appointments/SOGoAppointmentObject.m
index 30e4b44f7..d5b9b5aec 100644
--- a/SoObjects/Appointments/SOGoAppointmentObject.m
+++ b/SoObjects/Appointments/SOGoAppointmentObject.m
@@ -28,6 +28,8 @@
 
 #import <NGObjWeb/NSException+HTTP.h>
 #import <NGObjWeb/WOContext+SoObjects.h>
+#import <NGObjWeb/WOResponse.h>
+#import <NGExtensions/NGCalendarDateRange.h>
 #import <NGExtensions/NSNull+misc.h>
 #import <NGExtensions/NSObject+Logs.h>
 #import <NGCards/iCalCalendar.h>
@@ -35,10 +37,11 @@
 #import <NGCards/iCalEvent.h>
 #import <NGCards/iCalEventChanges.h>
 #import <NGCards/iCalPerson.h>
+#import <NGCards/iCalRecurrenceCalculator.h>
 #import <NGCards/NSCalendarDate+NGCards.h>
 #import <SaxObjC/XMLNamespaces.h>
 
-#import <SOPE/NGCards/NSString+NGCards.h>
+#import <NGCards/NSString+NGCards.h>
 
 #import <SOGo/SOGoConstants.h>
 #import <SOGo/SOGoUserManager.h>