diff --git a/cmd/switch/main.go b/cmd/switch/main.go
index e22fa4c..e16b9cb 100755
--- a/cmd/switch/main.go
+++ b/cmd/switch/main.go
@@ -6,9 +6,11 @@ import (
 	"github.com/luscis/openlan/pkg/config"
 	"github.com/luscis/openlan/pkg/libol"
 	"github.com/luscis/openlan/pkg/switch"
+	"log"
 )
 
 func main() {
+	log.SetFlags(0)
 	udp := api.GetEnv("ESPUDP", "4500")
 	config.SetLocalUdp(udp)
 	c := config.NewSwitch()
diff --git a/pkg/libol/logger.go b/pkg/libol/logger.go
index 102d6eb..ba2a1ad 100755
--- a/pkg/libol/logger.go
+++ b/pkg/libol/logger.go
@@ -234,7 +234,3 @@ func (s *SubLogger) Error(format string, v ...interface{}) {
 func (s *SubLogger) Fatal(format string, v ...interface{}) {
 	s.logger.Write(FATAL, s.Fmt(format), v...)
 }
-
-func init() {
-	log.SetFlags(0)
-}