diff --git a/daprdocs/content/en/developing-applications/building-blocks/service-invocation/howto-invoke-discover-services.md b/daprdocs/content/en/developing-applications/building-blocks/service-invocation/howto-invoke-discover-services.md
index e48ca064d..c3cc7ac94 100644
--- a/daprdocs/content/en/developing-applications/building-blocks/service-invocation/howto-invoke-discover-services.md
+++ b/daprdocs/content/en/developing-applications/building-blocks/service-invocation/howto-invoke-discover-services.md
@@ -296,6 +296,7 @@ import { DaprClient, HttpMethod, CommunicationProtocolEnum } from 'dapr-client';
 
 //code
 
+const daprHost = "127.0.0.1"; 
 const client = new DaprClient(daprHost, process.env.DAPR_HTTP_PORT, CommunicationProtocolEnum.HTTP);
 const result = await client.invoker.invoke('checkoutservice' , "checkout/" + orderId , HttpMethod.GET);