diff --git a/src/util/ConvertArrayBuffer.js b/src/util/ConvertArrayBuffer.js
index 26b1cc8b7..c6bd36433 100644
--- a/src/util/ConvertArrayBuffer.js
+++ b/src/util/ConvertArrayBuffer.js
@@ -1,10 +1,3 @@
-function arrayBufferToBuffer(ab) {
-  const buffer = new Buffer(ab.byteLength);
-  const view = new Uint8Array(ab);
-  for (var i = 0; i < buffer.length; ++i) buffer[i] = view[i];
-  return buffer;
-}
-
 function str2ab(str) {
   const buffer = new ArrayBuffer(str.length * 2);
   const view = new Uint16Array(buffer);
@@ -14,5 +7,5 @@ function str2ab(str) {
 
 module.exports = function convertArrayBuffer(x) {
   if (typeof x === 'string') x = str2ab(x);
-  return arrayBufferToBuffer(x);
+  return Buffer.from(x);
 };