diff --git a/docs/concepts/services-networking/service.md b/docs/concepts/services-networking/service.md
index f8c7757e51..4e6e12bf7a 100644
--- a/docs/concepts/services-networking/service.md
+++ b/docs/concepts/services-networking/service.md
@@ -140,6 +140,8 @@ metadata:
 spec:
   type: ExternalName
   externalName: my.database.example.com
+  ports:
+  - port: 12345
 ```
 
 When looking up the host `my-service.prod.svc.CLUSTER`, the cluster DNS service