diff --git a/gestion/lib/Constants/VCalendarPropertyConstant.php b/gestion/lib/Constants/VCalendarPropertyConstant.php
index 56bc919..1423075 100644
--- a/gestion/lib/Constants/VCalendarPropertyConstant.php
+++ b/gestion/lib/Constants/VCalendarPropertyConstant.php
@@ -5,6 +5,7 @@ namespace OCA\Gestion\Constants;
 abstract class VCalendarPropertyConstant 
 {
     const PROPERTY_IS_LEAVE = "ISLEAVE";
+    const PROPERTY_IS_PRIVATE = "ISPRIVATE";
     const PROPERTY_IS_CALENDAR_PENDING = "ISCALENDARPENDING";
     const ABSENCE_TYPE = "ABSENCETYPE";