diff --git a/PROTOCOL.md b/PROTOCOL.md
index 8ad16c2..835c2e9 100644
--- a/PROTOCOL.md
+++ b/PROTOCOL.md
@@ -66,7 +66,7 @@ After (and only after) a client passes authentication, the server MUST consider
 
 ### TCP
 
-For each TCP connection, the client MUST create a new QUIC unidirectional stream and send the following TCPRequest message:
+For each TCP connection, the client MUST create a new QUIC bidirectional stream and send the following TCPRequest message:
 
 ```
 [varint] 0x401 (TCPRequest ID)