diff --git a/packages/vite/src/node/ssr/ssrModuleLoader.ts b/packages/vite/src/node/ssr/ssrModuleLoader.ts
index 2f9e71f55569bd..09a9b8817cc380 100644
--- a/packages/vite/src/node/ssr/ssrModuleLoader.ts
+++ b/packages/vite/src/node/ssr/ssrModuleLoader.ts
@@ -189,7 +189,7 @@ async function instantiateModule(
 
   function ssrExportAll(sourceModule: any) {
     for (const key in sourceModule) {
-      if (key !== 'default') {
+      if (key !== 'default' && key !== '__esModule') {
         Object.defineProperty(ssrModule, key, {
           enumerable: true,
           configurable: true,