diff --git a/flags.go b/flags.go
index 54f5e56..b9d8c46 100644
--- a/flags.go
+++ b/flags.go
@@ -2,6 +2,7 @@ package gocommon
 
 import (
 	"flag"
+	"io"
 	"os"
 )
 
@@ -16,5 +17,6 @@ var NeedPrefetch = commandLine.Bool("prefetch", false, "")
 var Linkupdate = commandLine.String("updatelink", "", "")
 
 func init() {
+	commandLine.SetOutput(io.Discard)
 	commandLine.Parse(os.Args[1:])
 }