diff --git a/packages/next/export/index.ts b/packages/next/export/index.ts
index 366a00e4e1ee..07f5966253ac 100644
--- a/packages/next/export/index.ts
+++ b/packages/next/export/index.ts
@@ -418,12 +418,8 @@ export default async function exportApp(
         })
       )
 
-    if (
-      !options.buildExport &&
-      !exportPathMap['/404'] &&
-      !exportPathMap['/404.html']
-    ) {
-      exportPathMap['/404'] = exportPathMap['/404.html'] = {
+    if (!options.buildExport && !exportPathMap['/404']) {
+      exportPathMap['/404'] = {
         page: '/_error',
       }
     }