diff --git a/tunnel/tcp.go b/tunnel/tcp.go
index 5214318b..990ea46f 100644
--- a/tunnel/tcp.go
+++ b/tunnel/tcp.go
@@ -15,7 +15,7 @@ import (
 )
 
 const (
-	// tcpConnectTimeout is the default timeout for TCP handshake.
+	// tcpConnectTimeout is the default timeout for TCP handshakes.
 	tcpConnectTimeout = 5 * time.Second
 	// tcpWaitTimeout implements a TCP half-close timeout.
 	tcpWaitTimeout = 60 * time.Second