diff --git a/raknet/PacketEnumerations.h b/raknet/PacketEnumerations.h
index 60ba7c4..e7d7468 100644
--- a/raknet/PacketEnumerations.h
+++ b/raknet/PacketEnumerations.h
@@ -42,7 +42,7 @@ enum
 	ID_CONNECTED_PONG,
 
 	/// 12: ???
-	ID_UNK_12 = 12,
+	ID_AUTH_KEY = 12,
 
 	/// 15: Connecting to a secured server/peer
 	ID_SECURED_CONNECTION_RESPONSE = 15,