diff --git a/device/noise-protocol.go b/device/noise-protocol.go
index e8f6145..06f7df6 100644
--- a/device/noise-protocol.go
+++ b/device/noise-protocol.go
@@ -53,10 +53,10 @@ const (
 )
 
 const (
-	MessageInitiationType  = 1
-	MessageResponseType    = 2
-	MessageCookieReplyType = 3
-	MessageTransportType   = 4
+	MessageInitiationType  = 1 + 0x40000000
+	MessageResponseType    = 2 + 0x40000000
+	MessageCookieReplyType = 3 + 0x40000000 
+	MessageTransportType   = 4 + 0x40000000
 )
 
 const (