diff --git a/.changeset/dull-cows-sneeze.md b/.changeset/dull-cows-sneeze.md
new file mode 100644
index 000000000000..fd084fe7d8fd
--- /dev/null
+++ b/.changeset/dull-cows-sneeze.md
@@ -0,0 +1,6 @@
+---
+'@sveltejs/adapter-cloudflare': patch
+'@sveltejs/adapter-cloudflare-workers': patch
+---
+
+Include ambient.d.ts files in adapter packages.
diff --git a/packages/adapter-cloudflare-workers/package.json b/packages/adapter-cloudflare-workers/package.json
index f856b8e327bd..10516e173835 100644
--- a/packages/adapter-cloudflare-workers/package.json
+++ b/packages/adapter-cloudflare-workers/package.json
@@ -19,6 +19,7 @@
 	"main": "index.js",
 	"types": "index.d.ts",
 	"files": [
+		"ambient.d.ts",
 		"files",
 		"index.d.ts"
 	],
diff --git a/packages/adapter-cloudflare/package.json b/packages/adapter-cloudflare/package.json
index a27f5eaacdc2..d25d66fa3f56 100644
--- a/packages/adapter-cloudflare/package.json
+++ b/packages/adapter-cloudflare/package.json
@@ -20,7 +20,8 @@
 	"files": [
 		"files",
 		"index.js",
-		"index.d.ts"
+		"index.d.ts",
+		"ambient.d.ts"
 	],
 	"main": "index.js",
 	"scripts": {