diff --git a/packages/@vue/cli-service/lib/config/app.js b/packages/@vue/cli-service/lib/config/app.js
index c262fb9b3..2bed9f9af 100644
--- a/packages/@vue/cli-service/lib/config/app.js
+++ b/packages/@vue/cli-service/lib/config/app.js
@@ -94,7 +94,7 @@ module.exports = (api, options) => {
 
     if (isProd) {
       // handle indexPath
-      if (options.indexPath) {
+      if (options.indexPath !== 'index.html') {
         // why not set filename for html-webpack-plugin?
         // 1. It cannot handle absolute paths
         // 2. Relative paths causes incorrect SW manifest to be generated (#2007)