diff --git a/packages/next/build/utils.ts b/packages/next/build/utils.ts
index 957be22026388..08d9edb1e2994 100644
--- a/packages/next/build/utils.ts
+++ b/packages/next/build/utils.ts
@@ -1230,6 +1230,7 @@ server.listen(currentPort, (err) => {
     port: currentPort,
     dir: path.join(__dirname),
     dev: false,
+    customServer: false,
     conf: ${JSON.stringify({
       ...serverConfig,
       distDir: `./${path.relative(dir, distDir)}`,