diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/timeseries-table-widget.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/timeseries-table-widget.component.ts
index 3654c1f708..ffbfbb94c0 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/timeseries-table-widget.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/timeseries-table-widget.component.ts
@@ -234,7 +234,7 @@ export class TimeseriesTableWidgetComponent extends PageComponent implements OnI
     this.updateDatasources();
   }
 
-  public getTabLabel(source){
+  public getTabLabel(source: TimeseriesTableSource){
     if(this.useDeviceLabel){
       return source.datasource.entityLabel || source.datasource.entityName;
     } else {