diff --git a/layouts/v7/modules/Calendar/resources/Calendar.js b/layouts/v7/modules/Calendar/resources/Calendar.js
index 5668d290dc63bf71634c903e2c0a968249210c7f..56a820178d3b49f51c77a5cc54ef210fb9be7bd1 100644
--- a/layouts/v7/modules/Calendar/resources/Calendar.js
+++ b/layouts/v7/modules/Calendar/resources/Calendar.js
@@ -749,7 +749,7 @@ Vtiger.Class("Calendar_Calendar_Js", {
 		};
 		app.request.post({'data': params}).then(function (e, result) {
 			if (!e) {
-				if (result['success']) {
+				if (!result['success']) {
 					aDeferred.resolve(result);
 				} else {
 					aDeferred.reject(result);