diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1f3262f34c..9235c5e92d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 * Add a11y warning `a11y-mouse-events-have-key-events` which checks that `mouseover`/`mouseout` are accompanied by `focus`/`blur` event handlers ([#5938](https://github.com/sveltejs/svelte/pull/5938))
 * Remove deprecated a11y warning `a11y-no-onchange warning` ([#6457](https://github.com/sveltejs/svelte/issues/6457))
 * Stop checking `a11y-media-has-caption` a11y warning on `<audio>` elements ([#6054](https://github.com/sveltejs/svelte/issues/6054))
+* Relax `derived` function signature ([#6178](https://github.com/sveltejs/svelte/issues/6178))
 
 ## 3.38.3
 
diff --git a/src/runtime/store/index.ts b/src/runtime/store/index.ts
index 213a4ff6fd..89e459ded1 100644
--- a/src/runtime/store/index.ts
+++ b/src/runtime/store/index.ts
@@ -113,7 +113,7 @@ export function writable<T>(value?: T, start: StartStopNotifier<T> = noop): Writ
 }
 
 /** One or more `Readable`s. */
-type Stores = Readable<any> | [Readable<any>, ...Array<Readable<any>>];
+type Stores = Readable<any> | [Readable<any>, ...Array<Readable<any>>] | Array<Readable<any>>;
 
 /** One or more values from `Readable` stores. */
 type StoresValues<T> = T extends Readable<infer U> ? U :