diff --git a/randombytes.js b/randombytes.js
index d4dcc75..c19a660 100644
--- a/randombytes.js
+++ b/randombytes.js
@@ -6,7 +6,7 @@ var randombytes = (function () {
 
   function browserBytes (out, n) {
     for (let i = 0; i < n; i += QUOTA) {
-      crypto.getRandomValues(out.subarray(i, i + Math.min(n - i, QUOTA)))
+      crypto.getRandomValues(new Uint8Array(out.buffer, i, Math.min(n - i, QUOTA)))
     }
   }
 
@@ -36,5 +36,5 @@ Object.defineProperty(module.exports, 'randombytes', {
 
 module.exports.randombytes_buf = function (out) {
   assert(out, 'out must be given')
-  randombytes(out, out.length)
+  randombytes(out, out.byteLength)
 }