diff --git a/packages/vite/src/node/server/middlewares/indexHtml.ts b/packages/vite/src/node/server/middlewares/indexHtml.ts
index 3c57832db0fd20..2e4e358d42c453 100644
--- a/packages/vite/src/node/server/middlewares/indexHtml.ts
+++ b/packages/vite/src/node/server/middlewares/indexHtml.ts
@@ -102,12 +102,7 @@ const processNodeUrl = (
     originalUrl !== '/' &&
     htmlPath === '/index.html'
   ) {
-    const replacer = (url: string) =>
-      path.posix.join(
-        devBase,
-        path.posix.relative(originalUrl, devBase),
-        url.slice(1)
-      )
+    const replacer = (url: string) => path.posix.join(devBase, url.slice(1))
 
     // #3230 if some request url (localhost:3000/a/b) return to fallback html, the relative assets
     // path will add `/a/` prefix, it will caused 404.