diff --git a/lib/buffer.js b/lib/buffer.js
index adb551a9e4e..ed159158415 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -66,7 +66,7 @@ function Buffer(subject, encoding) {
                          'size: 0x' + kMaxLength.toString(16) + ' bytes');
   }
 
-  this.parent = null;
+  this.parent = undefined;
   if (this.length <= (Buffer.poolSize >>> 1) && this.length > 0) {
     if (this.length > poolSize - poolOffset)
       createPool();
@@ -118,7 +118,9 @@ function SlowBuffer(length) {
 // Objects created in C++. Significantly faster than calling the Buffer
 // function.
 function NativeBuffer(length) {
-  this.length = length;
+  this.length = length >>> 0;
+  // Set this to keep the object map the same.
+  this.parent = undefined;
 }
 NativeBuffer.prototype = Buffer.prototype;