diff --git a/packages/docs/docs/theme/default-theme-config.md b/packages/docs/docs/theme/default-theme-config.md
index ed2245efc0..03b5ef7734 100644
--- a/packages/docs/docs/theme/default-theme-config.md
+++ b/packages/docs/docs/theme/default-theme-config.md
@@ -211,7 +211,7 @@ module.exports = {
     sidebar: [
       {
         title: 'Group 1',   // required
-        path: '/foo/',      // optional, which should be a absolute path.
+        path: '/foo/',      // optional, link of the title, which should be an absolute path and must exist
         collapsable: false, // optional, defaults to true
         sidebarDepth: 1,    // optional, defaults to 1
         children: [