diff --git a/lib/build/index.js b/lib/build/index.js
index 56c6a5aa16..93cf01e393 100644
--- a/lib/build/index.js
+++ b/lib/build/index.js
@@ -252,7 +252,10 @@ function cleanChildrenRoutes (routes, isChild = false) {
     if ((isChild && /-index$/.test(route.name)) || (!isChild && route.name === 'index')) {
       hasIndex = true
     }
-    route.path = (hasIndex) ? route.path.replace('?', '') : route.path
+    let names = route.path.split('/')
+    if (hasIndex && (isChild || (!isChild && names[1] && names[1].indexOf('?') > -1))) {
+      route.path = route.path.replace('?', '')
+    }
     if (/-index$/.test(route.name)) {
       parents.push(route.name)
     } else {