diff --git a/.changeset/shaggy-walls-wave.md b/.changeset/shaggy-walls-wave.md
new file mode 100644
index 000000000000..fa29a15129d3
--- /dev/null
+++ b/.changeset/shaggy-walls-wave.md
@@ -0,0 +1,6 @@
+---
+"@sveltejs/adapter-vercel": patch
+"@sveltejs/adapter-node": patch
+---
+
+fix: include ambient type declarations
diff --git a/packages/adapter-cloudflare-workers/placeholders.d.ts b/packages/adapter-cloudflare-workers/internal.d.ts
similarity index 100%
rename from packages/adapter-cloudflare-workers/placeholders.d.ts
rename to packages/adapter-cloudflare-workers/internal.d.ts
diff --git a/packages/adapter-cloudflare-workers/tsconfig.json b/packages/adapter-cloudflare-workers/tsconfig.json
index 1cb740d0614c..e4cdc5abd1b7 100644
--- a/packages/adapter-cloudflare-workers/tsconfig.json
+++ b/packages/adapter-cloudflare-workers/tsconfig.json
@@ -13,5 +13,5 @@
 			"@sveltejs/kit": ["../kit/types/index"]
 		}
 	},
-	"include": ["**/*.js", "placeholders.d.ts"]
+	"include": ["**/*.js", "internal.d.ts"]
 }
diff --git a/packages/adapter-cloudflare/placeholders.d.ts b/packages/adapter-cloudflare/internal.d.ts
similarity index 100%
rename from packages/adapter-cloudflare/placeholders.d.ts
rename to packages/adapter-cloudflare/internal.d.ts
diff --git a/packages/adapter-cloudflare/tsconfig.json b/packages/adapter-cloudflare/tsconfig.json
index 7ebf502ced9e..b258035a3555 100644
--- a/packages/adapter-cloudflare/tsconfig.json
+++ b/packages/adapter-cloudflare/tsconfig.json
@@ -12,5 +12,5 @@
 			"@sveltejs/kit": ["../kit/types/index"]
 		}
 	},
-	"include": ["index.js", "placeholders.d.ts", "src/worker.js"]
+	"include": ["index.js", "internal.d.ts", "src/worker.js"]
 }
diff --git a/packages/adapter-netlify/index.d.ts b/packages/adapter-netlify/index.d.ts
index aef282740b2f..6bdc8db882dc 100644
--- a/packages/adapter-netlify/index.d.ts
+++ b/packages/adapter-netlify/index.d.ts
@@ -1,4 +1,3 @@
 import { Adapter } from '@sveltejs/kit';
-import './ambient.js';
 
 export default function plugin(opts?: { split?: boolean; edge?: boolean }): Adapter;
diff --git a/packages/adapter-netlify/ambient.d.ts b/packages/adapter-netlify/internal.d.ts
similarity index 100%
rename from packages/adapter-netlify/ambient.d.ts
rename to packages/adapter-netlify/internal.d.ts
diff --git a/packages/adapter-netlify/tsconfig.json b/packages/adapter-netlify/tsconfig.json
index 1eeee8b0847d..cdc2d9ec2a62 100644
--- a/packages/adapter-netlify/tsconfig.json
+++ b/packages/adapter-netlify/tsconfig.json
@@ -15,5 +15,5 @@
 			"@sveltejs/kit": ["../kit/types/index"]
 		}
 	},
-	"include": ["*.js", "src/**/*.js", "ambient.d.ts"]
+	"include": ["*.js", "src/**/*.js", "internal.d.ts"]
 }
diff --git a/packages/adapter-node/ambient.d.ts b/packages/adapter-node/ambient.d.ts
index acdc19bb2587..7fbdd5adb583 100644
--- a/packages/adapter-node/ambient.d.ts
+++ b/packages/adapter-node/ambient.d.ts
@@ -1,28 +1,12 @@
-declare module 'ENV' {
-	export function env(key: string, fallback?: any): string;
-}
-
-declare module 'HANDLER' {
-	export const handler: import('polka').Middleware;
-}
-
-declare module 'MANIFEST' {
-	import { SSRManifest } from '@sveltejs/kit';
-
-	export const base: string;
-	export const manifest: SSRManifest;
-	export const prerendered: Set<string>;
-}
-
-declare module 'SERVER' {
-	export { Server } from '@sveltejs/kit';
-}
-
-declare namespace App {
-	export interface Platform {
-		/**
-		 * The original Node request object (https://nodejs.org/api/http.html#class-httpincomingmessage)
-		 */
-		req: import('http').IncomingMessage;
+import http from 'node:http';
+
+declare global {
+	namespace App {
+		export interface Platform {
+			/**
+			 * The original Node request object (https://nodejs.org/api/http.html#class-httpincomingmessage)
+			 */
+			req: http.IncomingMessage;
+		}
 	}
 }
diff --git a/packages/adapter-node/internal.d.ts b/packages/adapter-node/internal.d.ts
new file mode 100644
index 000000000000..fed0584d1851
--- /dev/null
+++ b/packages/adapter-node/internal.d.ts
@@ -0,0 +1,19 @@
+declare module 'ENV' {
+	export function env(key: string, fallback?: any): string;
+}
+
+declare module 'HANDLER' {
+	export const handler: import('polka').Middleware;
+}
+
+declare module 'MANIFEST' {
+	import { SSRManifest } from '@sveltejs/kit';
+
+	export const base: string;
+	export const manifest: SSRManifest;
+	export const prerendered: Set<string>;
+}
+
+declare module 'SERVER' {
+	export { Server } from '@sveltejs/kit';
+}
diff --git a/packages/adapter-node/package.json b/packages/adapter-node/package.json
index 3d66d62c86a0..6f9fe38f5c2c 100644
--- a/packages/adapter-node/package.json
+++ b/packages/adapter-node/package.json
@@ -29,7 +29,8 @@
 	"files": [
 		"files",
 		"index.js",
-		"index.d.ts"
+		"index.d.ts",
+		"ambient.d.ts"
 	],
 	"scripts": {
 		"dev": "node -e \"fs.rmSync('files', { force: true, recursive: true })\" && rollup -cw",
diff --git a/packages/adapter-node/tsconfig.json b/packages/adapter-node/tsconfig.json
index 17a612157ece..790cb0a51563 100644
--- a/packages/adapter-node/tsconfig.json
+++ b/packages/adapter-node/tsconfig.json
@@ -13,5 +13,5 @@
 			"@sveltejs/kit": ["../kit/types/index"]
 		}
 	},
-	"include": ["index.js", "src/**/*.js", "ambient.d.ts"]
+	"include": ["index.js", "src/**/*.js", "internal.d.ts"]
 }
diff --git a/packages/adapter-vercel/package.json b/packages/adapter-vercel/package.json
index 4e43e02401a6..43394dd6d10e 100644
--- a/packages/adapter-vercel/package.json
+++ b/packages/adapter-vercel/package.json
@@ -30,7 +30,8 @@
 		"files",
 		"index.js",
 		"utils.js",
-		"index.d.ts"
+		"index.d.ts",
+		"ambient.d.ts"
 	],
 	"scripts": {
 		"lint": "prettier --check .",