diff --git a/transport/internet/tls/tls.go b/transport/internet/tls/tls.go
index 0dfa7fe45..df5d1cbd7 100644
--- a/transport/internet/tls/tls.go
+++ b/transport/internet/tls/tls.go
@@ -147,11 +147,6 @@ func GeneraticUClient(c net.Conn, config *tls.Config) *utls.UConn {
 }
 
 func copyConfig(c *tls.Config) *utls.Config {
-	curvePreferences := make([]utls.CurveID, 0, len(c.CurvePreferences))
-	for _, curve := range c.CurvePreferences {
-		curvePreferences = append(curvePreferences, utls.CurveID(curve))
-	}
-
 	config := &utls.Config{
 		Rand:                           c.Rand,
 		RootCAs:                        c.RootCAs,
@@ -161,10 +156,6 @@ func copyConfig(c *tls.Config) *utls.Config {
 		KeyLogWriter:                   c.KeyLogWriter,
 		EncryptedClientHelloConfigList: c.EncryptedClientHelloConfigList,
 		NextProtos:                     c.NextProtos,
-		CipherSuites:                   c.CipherSuites,
-		MinVersion:                     c.MinVersion,
-		MaxVersion:                     c.MaxVersion,
-		CurvePreferences:               curvePreferences,
 	}
 	return config
 }