diff --git a/src/typedarray.js b/src/typedarray.js
index da12ccf..1e67bc3 100644
--- a/src/typedarray.js
+++ b/src/typedarray.js
@@ -30,7 +30,7 @@
 // This file relies on the fact that the following declaration has been made
 // in runtime.js:
 // var $Array = global.Array;
-
+var $ArrayBuffer = global.ArrayBuffer;
 
 
 // --------------- Typed Arrays ---------------------
@@ -70,7 +70,7 @@
   function ConstructByLength(obj, length) {
     var l = ToPositiveInteger(length, "invalid_typed_array_length");
     var byteLength = l * elementSize;
-    var buffer = new global.ArrayBuffer(byteLength);
+    var buffer = new $ArrayBuffer(byteLength);
     %TypedArrayInitialize(obj, arrayId, buffer, 0, byteLength);
   }