diff --git a/projects/hslayers-cesium-app/src/app/app.component.ts b/projects/hslayers-cesium-app/src/app/app.component.ts
index ff80cabae6..58048f586e 100644
--- a/projects/hslayers-cesium-app/src/app/app.component.ts
+++ b/projects/hslayers-cesium-app/src/app/app.component.ts
@@ -32,7 +32,7 @@ import {HsLayoutService} from 'hslayers-ng/services/layout';
   styleUrls: [],
 })
 export class AppComponent implements OnInit {
-  id;
+  id = '';
   constructor(
     public HsConfig: HsConfig,
     private HsCesiumConfig: HsCesiumConfig,