diff --git a/doc/tutorials/background.md b/doc/tutorials/background.md
index 61896c758a..cf0d96a4bf 100644
--- a/doc/tutorials/background.md
+++ b/doc/tutorials/background.md
@@ -19,7 +19,7 @@ OpenLayers is available as [`ol` npm package](https://npmjs.com/package/ol), whi
 
 By default, OpenLayers uses a performance optimized Canvas renderer.
 
-OpenLayers runs on all modern browsers that support [HTML5](https://html.spec.whatwg.org/multipage/) and [ECMAScript 5](http://www.ecma-international.org/ecma-262/5.1/). This includes Chrome, Firefox, Safari and Edge. For older browsers and platforms like Internet Explorer (down to version 9) and Android 4.x, [polyfills](http://polyfill.io), the application bundle needs to be transpiled (e.g. using [Babel](https://babeljs.io)) and bundled with polyfills for `fetch`, `requestAnimationFrame`, `Element.prototype.classList`, `URL` and `TextDecoder`.
+OpenLayers runs on all modern browsers that support [HTML5](https://html.spec.whatwg.org/multipage/) and [ECMAScript 5](http://www.ecma-international.org/ecma-262/5.1/). This includes Chrome, Firefox, Safari and Edge. For older browsers and platforms like Internet Explorer (down to version 9) and Android 4.x, [polyfills](http://polyfill.io), the application bundle needs to be transpiled (e.g. using [Babel](https://babeljs.io)) and bundled with polyfills for `fetch`, `requestAnimationFrame`, `Element.prototype.classList`, `URL`, `TextDecoder` and `Number.isInteger`.
 
 The library is intended for use on both desktop/laptop and mobile devices, and supports pointer and touch interactions.