diff --git a/docs/src/pages/core-concepts/component-hydration.md b/docs/src/pages/core-concepts/component-hydration.md
index e1e7efa50..9aeadb79c 100644
--- a/docs/src/pages/core-concepts/component-hydration.md
+++ b/docs/src/pages/core-concepts/component-hydration.md
@@ -91,3 +91,4 @@ Alternatively, you could add a `<script>` tag to your Astro component HTML templ
 
 [mdn-io]: https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API
 [mdn-ric]: https://developer.mozilla.org/en-US/docs/Web/API/Window/requestIdleCallback
+[mdn-mm]: https://developer.mozilla.org/en-US/docs/Web/API/Window/matchMedia