diff --git a/calendar/js/app.js b/calendar/js/app.js
index f61bc474ff..b6be0479dd 100644
--- a/calendar/js/app.js
+++ b/calendar/js/app.js
@@ -3568,7 +3568,9 @@ var CalendarApp = /** @class */ (function (_super) {
                 email: egw.user('account_email'),
                 cal_id: _data.id,
                 title: _data.title
-            }, _data.start, _data.end], function (_value) {
+            }, _data.start, _data.end, {
+                participants: Object.keys(_data.participants).filter(function (v) { return v.match(/^[0-9]/); })
+            }], function (_value) {
             if (_value) {
                 if (_value.err)
                     egw.message(_value.err, 'error');
diff --git a/calendar/js/app.ts b/calendar/js/app.ts
index 16794d4132..2421e9938b 100644
--- a/calendar/js/app.ts
+++ b/calendar/js/app.ts
@@ -4429,7 +4429,9 @@ class CalendarApp extends EgwApp
 					email:egw.user('account_email'),
 					cal_id:_data.id,
 					title: _data.title
-				}, _data.start, _data.end], function(_value){
+				}, _data.start, _data.end, {
+					participants:Object.keys(_data.participants).filter(v => {return v.match(/^[0-9]/)})
+				}], function(_value){
 					if (_value)
 					{
 						if (_value.err) egw.message(_value.err, 'error');