diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6dfc87a323..7d2588d23e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+* Collapse whitespace in `class` and `style` attributes ([#6004](https://github.com/sveltejs/svelte/issues/6004))
 * Add `HTMLElement` and `SVGElement` as known globals ([#6643](https://github.com/sveltejs/svelte/issues/6643))
 * Account for scaling in `flip` animations ([#6657](https://github.com/sveltejs/svelte/issues/6657))