diff --git a/packages/utils/src/route.js b/packages/utils/src/route.js
index edc9616d6794..97d53ae1032d 100644
--- a/packages/utils/src/route.js
+++ b/packages/utils/src/route.js
@@ -56,7 +56,7 @@ function cleanChildrenRoutes (routes, isChild = false, routeNameSplitter = '-',
     route.path = isChild ? route.path.replace('/', '') : route.path
     if (route.path.includes('?')) {
       if (route.name.endsWith(`${routeNameSplitter}index`)) {
-        route.path = route.path.replace(/\?$/, '')
+        route.path = route.path.replace(/\?\/?$/, trailingSlash ? '/' : '')
       }
       const names = route.name.replace(regExpParentRouteName, '').split(routeNameSplitter)
       const paths = route.path.split('/')