diff --git a/packages/nuxt/src/pages/module.ts b/packages/nuxt/src/pages/module.ts
index 25bd2c0e6a23..e8b76fe278ae 100644
--- a/packages/nuxt/src/pages/module.ts
+++ b/packages/nuxt/src/pages/module.ts
@@ -122,6 +122,17 @@ export default defineNuxtModule({
           'export const START_LOCATION = Symbol(\'router:start-location\')'
         ].join('\n')
       })
+      addTypeTemplate({
+        filename: 'types/middleware.d.ts',
+        getContents: () => [
+          'declare module \'nitropack\' {',
+          '  interface NitroRouteConfig {',
+          '    appMiddleware?: string | string[] | Record<string, boolean>',
+          '  }',
+          '}',
+          'export {}'
+        ].join('\n')
+      })
       addComponent({
         name: 'NuxtPage',
         priority: 10, // built-in that we do not expect the user to override
@@ -464,7 +475,7 @@ export default defineNuxtModule({
 
     addTypeTemplate({
       filename: 'types/middleware.d.ts',
-      getContents: ({ nuxt, app }: { nuxt: Nuxt, app: NuxtApp }) => {
+      getContents: ({ nuxt, app }) => {
         const composablesFile = relative(join(nuxt.options.buildDir, 'types'), resolve(runtimeDir, 'composables'))
         const namedMiddleware = app.middleware.filter(mw => !mw.global)
         return [
diff --git a/test/fixtures/minimal-types/types.ts b/test/fixtures/minimal-types/types.ts
index 21feaeac4ffa..53232a4e76d3 100644
--- a/test/fixtures/minimal-types/types.ts
+++ b/test/fixtures/minimal-types/types.ts
@@ -19,6 +19,12 @@ describe('auto-imports', () => {
       // @ts-expect-error Should show error on unknown properties
       unknownProp: ''
     })
+    defineNuxtConfig({
+      routeRules: {
+        // Should accept any string
+        '/named': { appMiddleware: 'named' }
+      }
+    })
   })
   it('core composables', () => {
     ref()