diff --git a/code/client/global/port.go b/code/client/global/port.go
index b6fb8a3..cae974a 100644
--- a/code/client/global/port.go
+++ b/code/client/global/port.go
@@ -6,6 +6,7 @@ import (
 	"github.com/lwch/runtime"
 )
 
+// GeneratePort generate port for listen
 func GeneratePort() uint16 {
 	l, err := net.ListenTCP("tcp", &net.TCPAddr{})
 	runtime.Assert(err)