diff --git a/examples/client/codegen/README.md b/examples/client/codegen/README.md
index 21ebf15a..cbc65c93 100644
--- a/examples/client/codegen/README.md
+++ b/examples/client/codegen/README.md
@@ -51,6 +51,7 @@ greeter.proto
 ```shell
 syntax = "proto3";
 
+// package name is used as the service name for discovery
 package go.micro.srv.greeter;
 
 service Say {
@@ -66,6 +67,9 @@ message Response {
 }
 ```
 
+**Note: Remember to set package name in the proto, it's used to generate 
+the service for discovery.**
+
 ### Generate code
 
 ```shell