diff --git a/.changeset/wet-crews-smoke.md b/.changeset/wet-crews-smoke.md
new file mode 100644
index 000000000000..b6d9f4417cf8
--- /dev/null
+++ b/.changeset/wet-crews-smoke.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-vercel': patch
+---
+
+Use `platform: 'browser'` for esbuild in Vercel Edge Functions.
diff --git a/packages/adapter-vercel/index.js b/packages/adapter-vercel/index.js
index fc55c079f45d..532d3534e20a 100644
--- a/packages/adapter-vercel/index.js
+++ b/packages/adapter-vercel/index.js
@@ -186,7 +186,7 @@ export default function ({ external = [], edge, split } = {}) {
 					outfile: `${dirs.functions}/${name}.func/index.js`,
 					target: 'es2020', // TODO verify what the edge runtime supports
 					bundle: true,
-					platform: 'node',
+					platform: 'browser',
 					format: 'esm',
 					external,
 					sourcemap: 'linked'