diff --git a/ui-ngx/src/app/shared/components/device/gateway-statistics.component.ts b/ui-ngx/src/app/shared/components/device/gateway-statistics.component.ts
index 369b88afe9..cc0c2e0591 100644
--- a/ui-ngx/src/app/shared/components/device/gateway-statistics.component.ts
+++ b/ui-ngx/src/app/shared/components/device/gateway-statistics.component.ts
@@ -270,7 +270,7 @@ export class GatewayStatisticsComponent extends PageComponent implements AfterVi
       return;
     }
     this.dataSource.data = this.subscription.data.length ? this.subscription.data[0].data : [];
-    this.isNumericData = this.dataSource.data.every(data => isNumber(data[1]));
+    this.isNumericData = this.dataSource.data.every(data => !isNaN(+data[1]) );
   }