diff --git a/protocols.go b/protocols.go
index 75ee8cb..432ca06 100644
--- a/protocols.go
+++ b/protocols.go
@@ -32,6 +32,7 @@ const (
 	P_NOISE             = 0x01c6
 	P_WS                = 0x01DD
 	P_WSS               = 0x01DE // deprecated alias for /tls/ws
+	P_PLAINTEXTV2       = 0x706c61
 )
 
 var (
@@ -209,6 +210,11 @@ var (
 		Code:  P_NOISE,
 		VCode: CodeToVarint(P_NOISE),
 	}
+	protoPlaintextV2 = Protocol{
+		Name:  "plaintextv2",
+		Code:  P_PLAINTEXTV2,
+		VCode: CodeToVarint(P_PLAINTEXTV2),
+	}
 	protoWS = Protocol{
 		Name:  "ws",
 		Code:  P_WS,
@@ -251,6 +257,7 @@ func init() {
 		protoNOISE,
 		protoWS,
 		protoWSS,
+		protoPlaintextV2,
 	} {
 		if err := AddProtocol(p); err != nil {
 			panic(err)