diff --git a/ssh/messages.go b/ssh/messages.go
index 19bc67c464..922032d952 100644
--- a/ssh/messages.go
+++ b/ssh/messages.go
@@ -68,7 +68,7 @@ type kexInitMsg struct {
 
 // See RFC 4253, section 8.
 
-// Diffie-Helman
+// Diffie-Hellman
 const msgKexDHInit = 30
 
 type kexDHInitMsg struct {