diff --git a/lib/util.js b/lib/util.js
index 196e747..da2b092 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -176,7 +176,7 @@ exports.serializeString = function(s){
 
 
 exports.packUInt16LE = function(num){
-    var buff = new Buffer(4);
+    var buff = new Buffer(2);
     buff.writeUInt16LE(num, 0);
     return buff;
 };