diff --git a/packages/nuxt/config.d.ts b/packages/nuxt/config.d.ts
index 8d844bad6..ddd2beade 100644
--- a/packages/nuxt/config.d.ts
+++ b/packages/nuxt/config.d.ts
@@ -1,4 +1,5 @@
 import type { NuxtConfig } from 'nuxt/schema'
+import type { DefineConfig, InputConfig, UserInputConfig, ConfigLayerMeta } from 'c12'
 export { NuxtConfig } from 'nuxt/schema'
 
-export declare function defineNuxtConfig(config: NuxtConfig): NuxtConfig
+export declare const defineNuxtConfig: DefineConfig<NuxtConfig, ConfigLayerMeta>
diff --git a/packages/nuxt/package.json b/packages/nuxt/package.json
index 2dabc903b..4a53a1a10 100644
--- a/packages/nuxt/package.json
+++ b/packages/nuxt/package.json
@@ -61,6 +61,7 @@
     "@unhead/ssr": "^1.1.26",
     "@unhead/vue": "^1.1.26",
     "@vue/shared": "^3.2.47",
+    "c12": "^1.3.0",
     "chokidar": "^3.5.3",
     "cookie-es": "^0.5.0",
     "defu": "^6.1.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b89cd58db..b2aaefb3e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -587,6 +587,9 @@ importers:
       '@vue/shared':
         specifier: ^3.2.47
         version: 3.2.47
+      c12:
+        specifier: ^1.3.0
+        version: 1.4.1
       chokidar:
         specifier: ^3.5.3
         version: 3.5.3