diff --git a/decode/shadowsocks.go b/decode/shadowsocks.go
index 1ee712d..6705238 100644
--- a/decode/shadowsocks.go
+++ b/decode/shadowsocks.go
@@ -100,7 +100,9 @@ func ParseShadowsocks(u string) (ss Shadowsocks, err error) {
 			}
 		}
 	}
-
+	if ss.TransportStream.Protocol == "" {
+		ss.TransportStream.Protocol = "tcp"
+	}
 	if ss.TransportStream.Protocol == "websocket" {
 		ss.TransportStream.Protocol = "ws"
 	}
diff --git a/v2rayapi/streamconfig.go b/v2rayapi/streamconfig.go
index f4be9b3..e597b5e 100644
--- a/v2rayapi/streamconfig.go
+++ b/v2rayapi/streamconfig.go
@@ -2,6 +2,7 @@ package v2rayapi
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/golang/protobuf/proto"
 	"github.com/v2fly/v2ray-core/v5/common/serial"
@@ -11,7 +12,10 @@ import (
 )
 
 func GetTransportStreamConfig(network, path, hdhost string) (conf *internet.StreamConfig, err error) {
-	transproto := network
+	transproto := strings.TrimSpace(network)
+	if transproto == "" {
+		transproto = "tcp"
+	}
 	var transptl internet.TransportProtocol
 	var protoconf proto.Message
 	switch transproto {
@@ -27,7 +31,7 @@ func GetTransportStreamConfig(network, path, hdhost string) (conf *internet.Stre
 		transptl = internet.TransportProtocol_TCP
 		protoconf = &tcp.Config{}
 	default:
-		err = fmt.Errorf("outbound network or transport not support %s. only support tcp, ws or websocket", transproto)
+		err = fmt.Errorf("outbound network or transport not support (%s). only support tcp, ws or websocket", transproto)
 	}
 	if err != nil {
 		return