diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 197bada5808..db1d500ce98 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -15,6 +15,7 @@ This serves two purposes:
 
 ### Changed
 - The `docs.sidebar.footer` config option now accepts a Markdown string to replace the default footer in https://github.com/hydephp/develop/pull/1477
+- Links in the `sitemap.xml` file will now be relative when a site URL is not set, instead of using the default localhost URL in https://github.com/hydephp/develop/pull/1479
 
 ### Deprecated
 - for soon-to-be removed features.