diff --git a/sys/modules/opus/socket.lua b/sys/modules/opus/socket.lua
index 8aad0c9..4ea4195 100644
--- a/sys/modules/opus/socket.lua
+++ b/sys/modules/opus/socket.lua
@@ -107,7 +107,7 @@ end
 local function setupCrypto(socket, isClient)
 	socket.sharedKey = ECC.exchange(socket.privKey, socket.remotePubKey)
 	socket.enckey  = SHA.pbkdf2(socket.sharedKey, "1enc", 1)
-	--self.hmackey  = SHA.pbkdf2(self.sharedKey, "2hmac", 1)
+	socket.hmackey = SHA.pbkdf2(socket.sharedKey, "2hmac", 1)
 
 	socket.rrng  = Crypto.newRNG(
 		SHA.pbkdf2(socket.sharedKey, isClient and "3rseed" or "4sseed", 1))