diff --git a/.changeset/new-news-drive.md b/.changeset/new-news-drive.md
new file mode 100644
index 000000000000..21b8cceda587
--- /dev/null
+++ b/.changeset/new-news-drive.md
@@ -0,0 +1,7 @@
+---
+"wrangler": patch
+---
+
+fix: Ensure we don't mangle internal constructor names in the wrangler bundle when building with esbuild
+
+Undici changed how they referenced `FormData`, which meant that when used in our bundle process, we were failing to upload `multipart/form-data` bodies. This affected `wrangler pages publish` and `wrangler publish`.
diff --git a/packages/wrangler/scripts/bundle.ts b/packages/wrangler/scripts/bundle.ts
index 268216e25059..2473ff26c92c 100644
--- a/packages/wrangler/scripts/bundle.ts
+++ b/packages/wrangler/scripts/bundle.ts
@@ -38,6 +38,7 @@ async function buildMain(flags: BuildFlags = {}) {
 		wranglerPackageDir
 	)}"`;
 	await build({
+		keepNames: true,
 		entryPoints: ["./src/cli.ts"],
 		bundle: true,
 		outdir,