diff --git a/packages/vite/src/node/build.ts b/packages/vite/src/node/build.ts
index 6fe156e3b4e89c..c3d59d88a0549b 100644
--- a/packages/vite/src/node/build.ts
+++ b/packages/vite/src/node/build.ts
@@ -460,6 +460,9 @@ async function doBuild(
         exports: cjsSsrBuild ? 'named' : 'auto',
         sourcemap: options.sourcemap,
         name: libOptions ? libOptions.name : undefined,
+        // es2015 enables `generatedCode.symbols`
+        // - #764 add `Symbol.toStringTag` when build es module into cjs chunk
+        // - #1048 add `Symbol.toStringTag` for module default export
         generatedCode: 'es2015',
         entryFileNames: ssr
           ? `[name].${jsExt}`
@@ -472,9 +475,6 @@ async function doBuild(
         assetFileNames: libOptions
           ? `[name].[ext]`
           : path.posix.join(options.assetsDir, `[name].[hash].[ext]`),
-        // #764 add `Symbol.toStringTag` when build es module into cjs chunk
-        // #1048 add `Symbol.toStringTag` for module default export
-        namespaceToStringTag: true,
         inlineDynamicImports:
           output.format === 'umd' ||
           output.format === 'iife' ||