diff --git a/CHANGELOG.md b/CHANGELOG.md
index b469ac5..ce58aac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [1.2.1] - 2021-04-29
+
+* Improve [browser compatibility][pr#24] by using `Buffer.isBuffer` instead of
+  `instanceof` to confirm Buffer types.
+
 ## [1.2.0] - 2018-03-14
 
 * **API** Add [UTF8][doc:UTF8] to encode UTF strings in a possibly
@@ -131,6 +136,7 @@
 
 * Initial release.
 
+[1.2.1]: https://github.com/pabigot/buffer-layout/compare/v1.2.0...v1.2.1
 [1.2.0]: https://github.com/pabigot/buffer-layout/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/pabigot/buffer-layout/compare/v1.0.0...v1.1.0
 [1.0.0]: https://github.com/pabigot/buffer-layout/compare/v0.13.0...v1.0.0
@@ -193,6 +199,7 @@
 [issue#19]: https://github.com/pabigot/buffer-layout/issues/19
 [issue#20]: https://github.com/pabigot/buffer-layout/issues/20
 [issue#21]: https://github.com/pabigot/buffer-layout/issues/21
+[pr#24]: https://github.com/pabigot/buffer-layout/pull/24
 [ci:travis]: https://travis-ci.org/pabigot/buffer-layout
 [ci:coveralls]: https://coveralls.io/github/pabigot/buffer-layout
 [node:issue#3992]: https://github.com/nodejs/node/issues/3992
diff --git a/lib/Layout.js b/lib/Layout.js
index b6cf096..3ed160c 100644
--- a/lib/Layout.js
+++ b/lib/Layout.js
@@ -1765,7 +1765,7 @@ class Union extends Layout {
    */
   getVariant(vb, offset) {
     let variant = vb;
-    if (vb instanceof Buffer) {
+    if (Buffer.isBuffer(vb)) {
       if (undefined === offset) {
         offset = 0;
       }
@@ -2325,7 +2325,7 @@ class Blob extends Layout {
     if (this.length instanceof ExternalLayout) {
       span = src.length;
     }
-    if (!((src instanceof Buffer)
+    if (!(Buffer.isBuffer(src)
           && (span === src.length))) {
       throw new TypeError(nameWithProperty('Blob.encode', this)
                           + ' requires (length ' + span + ') Buffer as src');
@@ -2361,7 +2361,7 @@ class CString extends Layout {
 
   /** @override */
   getSpan(b, offset) {
-    if (!(b instanceof Buffer)) {
+    if (!Buffer.isBuffer(b)) {
       throw new TypeError('b must be a Buffer');
     }
     if (undefined === offset) {
@@ -2452,7 +2452,7 @@ class UTF8 extends Layout {
 
   /** @override */
   getSpan(b, offset) {
-    if (!(b instanceof Buffer)) {
+    if (!Buffer.isBuffer(b)) {
       throw new TypeError('b must be a Buffer');
     }
     if (undefined === offset) {
diff --git a/package.json b/package.json
index 00ba755..0f4e830 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "buffer-layout",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "Translation between JavaScript values and Buffers",
   "keywords": [
     "Buffer",