diff --git a/lib/bufferbuilder.js b/lib/bufferbuilder.js
index dd8bb0c..e50bf71 100644
--- a/lib/bufferbuilder.js
+++ b/lib/bufferbuilder.js
@@ -35,7 +35,7 @@ BufferBuilder.prototype.append = function(data, type) {
 };
 
 BufferBuilder.prototype.getBuffer = function() {
-  var buffer = new Buffer(this._length);
+  var buffer = Buffer.allocUnsafe(this._length);
   var cursor = new BufferCursor(buffer);
   for (var i = 0, ii = this._pieces.length; i < ii; i++) {
     var tuple = this._pieces[i];