diff --git a/demo-shell-ng2/app/components/activiti/activiti-demo.component.ts b/demo-shell-ng2/app/components/activiti/activiti-demo.component.ts
index 279d1de0ec..949d63b147 100644
--- a/demo-shell-ng2/app/components/activiti/activiti-demo.component.ts
+++ b/demo-shell-ng2/app/components/activiti/activiti-demo.component.ts
@@ -75,7 +75,7 @@ export class ActivitiDemoComponent implements AfterViewInit {
     analyticsreportlist: AnalyticsReportListComponent;
 
     @Input()
-    appId: number;
+    appId: number = null;
 
     layoutType: string;
     currentTaskId: string;