diff --git a/lib/net.js b/lib/net.js
index 0865e9a69e18b8..847e417e67f4ca 100644
--- a/lib/net.js
+++ b/lib/net.js
@@ -1128,7 +1128,7 @@ var createServerHandle = exports._createServerHandle =
 
 
 Server.prototype._listen2 = function(address, port, addressType, backlog, fd) {
-  debug('listen2', address, port, addressType, backlog);
+  debug('listen2', address, port, addressType, backlog, fd);
   var self = this;
 
   // If there is not yet a handle, we need to create one and bind.