diff --git a/packages/config/index.d.ts b/packages/config/index.d.ts
new file mode 100644
index 0000000000..f4b4fe4432
--- /dev/null
+++ b/packages/config/index.d.ts
@@ -0,0 +1,2 @@
+// Dummy type definition file to provide backward compatibility
+// around Nuxt modules extending `@nuxt/config` for Nuxt < 2.9
diff --git a/packages/config/package.json b/packages/config/package.json
index 56cda7a350..41449761b3 100644
--- a/packages/config/package.json
+++ b/packages/config/package.json
@@ -4,9 +4,11 @@
   "repository": "nuxt/nuxt.js",
   "license": "MIT",
   "files": [
-    "dist"
+    "dist",
+    "index.d.ts"
   ],
   "main": "dist/config.js",
+  "typings": "index.d.ts",
   "dependencies": {
     "@nuxt/utils": "2.9.1",
     "consola": "^2.10.1",