diff --git a/lib/transport/peer.js b/lib/transport/peer.js
index bdb03a2..724cd2e 100644
--- a/lib/transport/peer.js
+++ b/lib/transport/peer.js
@@ -141,6 +141,8 @@ Peer.prototype.disconnect = function() {
 
 /**
  * Send a Message to the remote peer.
+ *
+ * @param {Message} message - A message instance
  */
 Peer.prototype.sendMessage = function(message) {
   this.socket.write(message.serialize(this.network));