diff --git a/.changeset/witty-news-dress.md b/.changeset/witty-news-dress.md
new file mode 100644
index 000000000000..5f7246e62a4d
--- /dev/null
+++ b/.changeset/witty-news-dress.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+Correctly populate asset manifest when generating service worker
diff --git a/packages/kit/src/core/build/index.js b/packages/kit/src/core/build/index.js
index df8f43ca14fb..971a9085b1f6 100644
--- a/packages/kit/src/core/build/index.js
+++ b/packages/kit/src/core/build/index.js
@@ -57,7 +57,7 @@ export async function build(config) {
 	const build_data = {
 		app_dir: config.kit.appDir,
 		manifest_data: options.manifest_data,
-		service_worker: options.service_worker_entry_file ? 'service_worker.js' : null, // TODO make file configurable?
+		service_worker: options.service_worker_entry_file ? 'service-worker.js' : null, // TODO make file configurable?
 		client,
 		server,
 		static: options.manifest_data.assets.map((asset) => posixify(asset.file)),