diff --git a/packages/request-state/src/runtime/middleware.ts b/packages/request-state/src/runtime/middleware.ts
index f03da1c9..f7efd142 100644
--- a/packages/request-state/src/runtime/middleware.ts
+++ b/packages/request-state/src/runtime/middleware.ts
@@ -1,8 +1,10 @@
-import type { ReadableStream } from 'node:stream/web';
+import type { ReadableStream as Stream } from 'node:stream/web';
 import { defineMiddleware } from 'astro/middleware';
 import { collectState } from './serverState.js';
 import { parse } from 'content-type';
 
+declare const ReadableStream: typeof Stream;
+
 export const onRequest = defineMiddleware(async (_, next) => {
 	const { getState, result } = await collectState(next);
 
@@ -26,6 +28,11 @@ export const onRequest = defineMiddleware(async (_, next) => {
 		}
 	}
 
-	// @ts-expect-error generator not assignable to ReadableStream
-	return new Response(render(), result);
+	if (typeof ReadableStream === 'undefined') {
+		// @ts-expect-error generator not assignable to ReadableStream
+		return new Response(render(), result);
+	}
+
+	// @ts-expect-error ReadableStream from Node doesn't match ReadableStream from Web API
+	return new Response(ReadableStream.from(render()), result);
 });