diff --git a/content/pages/configuring-a-custom-domain-for-your-github-pages-site/managing-a-custom-domain-for-your-github-pages-site.md b/content/pages/configuring-a-custom-domain-for-your-github-pages-site/managing-a-custom-domain-for-your-github-pages-site.md
index 05e0b384b9e5..e1c0cc329d27 100644
--- a/content/pages/configuring-a-custom-domain-for-your-github-pages-site/managing-a-custom-domain-for-your-github-pages-site.md
+++ b/content/pages/configuring-a-custom-domain-for-your-github-pages-site/managing-a-custom-domain-for-your-github-pages-site.md
@@ -46,7 +46,16 @@ To set up a `www` or custom subdomain, such as `www.example.com` or `blog.exampl
 {% data reusables.repositories.sidebar-settings %}
 {% data reusables.pages.sidebar-pages %}
 4. Under "Custom domain", type your custom domain, then click **Save**. If you are publishing your site from a branch, this will create a commit that adds a `CNAME` file to the root of your source branch. If you are publishing your site with a custom {% data variables.product.prodname_actions %} workflow , no `CNAME` file is created. For more information about your publishing source, see "[Configuring a publishing source for your GitHub Pages site](/pages/getting-started-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site)."
-  ![Save custom domain button](/assets/images/help/pages/save-custom-subdomain.png)
+![Save custom domain button](/assets/images/help/pages/save-custom-subdomain.png)
+
+{% note %}
+
+**Note:** If your custom domain is an internationalized domain name, you must enter the Punycode encoded version.
+
+For more information on Punycodes, see [Internationalized domain name](https://en.wikipedia.org/wiki/Internationalized_domain_name).
+
+{% endnote %}
+
 5. Navigate to your DNS provider and create a `CNAME` record that points your subdomain to the default domain for your site. For example, if you want to use the subdomain `www.example.com` for your user site, create a `CNAME` record that points `www.example.com` to `<user>.github.io`. If you want to use the subdomain `another.example.com` for your organization site, create a `CNAME` record that points `another.example.com` to `<organization>.github.io`. The `CNAME` record should always point to `<user>.github.io` or `<organization>.github.io`, excluding the repository name. {% data reusables.pages.contact-dns-provider %} {% data reusables.pages.default-domain-information %}
 
 {% indented_data_reference reusables.pages.wildcard-dns-warning spaces=3 %}