diff --git a/src/content/docs/en/reference/adapter-reference.mdx b/src/content/docs/en/reference/adapter-reference.mdx
index b7ba67302e3fe..b36b55784b568 100644
--- a/src/content/docs/en/reference/adapter-reference.mdx
+++ b/src/content/docs/en/reference/adapter-reference.mdx
@@ -193,7 +193,7 @@ export function start(manifest) {
 
 The following methods are provided:
 
-##### `app.render(request, routeData, locals)`
+##### `app.render(request, { routeData, locals })`
 
 This method calls the Astro page that matches the request, renders it, and returns a Promise to a [Response](https://developer.mozilla.org/en-US/docs/Web/API/Response) object. This also works for API routes that do not render pages.
 
@@ -201,12 +201,10 @@ This method calls the Astro page that matches the request, renders it, and retur
 const response = await app.render(request);
 ```
 
-The method accepts a mandatory `request` argument, and two other optional arguments: [`routeData`](/en/reference/integrations-reference/#routedata-type-reference) and [`locals`](/en/reference/api-reference/#astrolocals).
+The method accepts a mandatory `request` argument, and an optional argument for [`routeData`](/en/reference/integrations-reference/#routedata-type-reference) and [`locals`](/en/reference/api-reference/#astrolocals).
 
 Provide a value for `routeData` if you already know the route to render. Doing so will bypass the internal call to [`app.match`](#appmatchrequest) to determine the route to render.
 
-When  used, `locals` must be the third argument passed. You can pass `undefined` for `routeData` if you are not targeting a specific route.
-
 The example below reads a header named `x-private-header`, attempts to parse it as an object and pass it to `locals`, which can then be passed to any [middleware function](/en/guides/middleware/).
 
 ```js
@@ -217,7 +215,7 @@ try {
         locals = JSON.parse(privateHeader);
     }
 } finally {
-    const response = await app.render(request, undefined, locals);
+    const response = await app.render(request, { locals });
 }
 ```