diff --git a/.changeset/hungry-moles-turn.md b/.changeset/hungry-moles-turn.md
new file mode 100644
index 000000000000..7f537b5501d8
--- /dev/null
+++ b/.changeset/hungry-moles-turn.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-cloudflare-workers': patch
+---
+
+fix: declare the adapter plugin options as optional
diff --git a/packages/adapter-cloudflare-workers/index.d.ts b/packages/adapter-cloudflare-workers/index.d.ts
index 8b90611b73c3..d5ef5b24e7b5 100644
--- a/packages/adapter-cloudflare-workers/index.d.ts
+++ b/packages/adapter-cloudflare-workers/index.d.ts
@@ -1,4 +1,4 @@
 import { Adapter } from '@sveltejs/kit';
 import './ambient.js';
 
-export default function plugin(options: { config?: string }): Adapter;
+export default function plugin(options?: { config?: string }): Adapter;