diff --git a/proxy/vless/encoding/addons.go b/proxy/vless/encoding/addons.go
index 3b832c121..06f692989 100644
--- a/proxy/vless/encoding/addons.go
+++ b/proxy/vless/encoding/addons.go
@@ -17,7 +17,8 @@ func EncodeHeaderAddons(buffer *buf.Buffer, addons *Addons) error {
 	switch addons.Flow {
 	case vless.XRO:
 
-		if bytes, err := proto.Marshal(addons); err != nil {
+		bytes, err := proto.Marshal(addons)
+		if err != nil {
 			return newError("failed to marshal addons protobuf value").Base(err)
 		}
 		if err := buffer.WriteByte(byte(len(bytes))); err != nil {