diff --git a/.changeset/nasty-penguins-pump.md b/.changeset/nasty-penguins-pump.md
new file mode 100644
index 0000000000..c7bdf1ddc6
--- /dev/null
+++ b/.changeset/nasty-penguins-pump.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: add cleanup function signature to `createRawSnippet`
diff --git a/packages/svelte/src/internal/client/dom/blocks/snippet.js b/packages/svelte/src/internal/client/dom/blocks/snippet.js
index 32a9fb6918..460a5f3567 100644
--- a/packages/svelte/src/internal/client/dom/blocks/snippet.js
+++ b/packages/svelte/src/internal/client/dom/blocks/snippet.js
@@ -72,7 +72,7 @@ export function wrap_snippet(component, fn) {
  * @template {unknown[]} Params
  * @param {(...params: Getters<Params>) => {
  *   render: () => string
- *   setup?: (element: Element) => void
+ *   setup?: (element: Element) => void | (() => void)
  * }} fn
  * @returns {Snippet<Params>}
  */
diff --git a/packages/svelte/src/internal/server/blocks/snippet.js b/packages/svelte/src/internal/server/blocks/snippet.js
index d9469be511..3c5e860790 100644
--- a/packages/svelte/src/internal/server/blocks/snippet.js
+++ b/packages/svelte/src/internal/server/blocks/snippet.js
@@ -7,7 +7,7 @@
  * @template {unknown[]} Params
  * @param {(...params: Getters<Params>) => {
  *   render: () => string
- *   setup?: (element: Element) => void
+ *   setup?: (element: Element) => void | (() => void)
  * }} fn
  * @returns {Snippet<Params>}
  */
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index b7412c46e5..36f7a97229 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -378,7 +378,7 @@ declare module 'svelte' {
 	 * */
 	export function createRawSnippet<Params extends unknown[]>(fn: (...params: Getters<Params>) => {
 		render: () => string;
-		setup?: (element: Element) => void;
+		setup?: (element: Element) => void | (() => void);
 	}): Snippet<Params>;
 	/** Anything except a function */
 	type NotFunction<T> = T extends Function ? never : T;