diff --git a/flag/commandline.go b/flag/commandline.go
index a61d161..cd846fe 100644
--- a/flag/commandline.go
+++ b/flag/commandline.go
@@ -2,6 +2,7 @@ package flag
 
 import (
 	"flag"
+	"io"
 	"os"
 )
 
@@ -10,5 +11,6 @@ var Devflag = commandLine.Bool("dev", false, "")
 var Noauth = commandLine.Bool("noauth", false, "")
 
 func init() {
+	commandLine.SetOutput(io.Discard)
 	commandLine.Parse(os.Args[1:])
 }