diff --git a/src/client/theme-default/components/SideBar.ts b/src/client/theme-default/components/SideBar.ts
index d12e3f209d2a..8a8b677c8ea5 100644
--- a/src/client/theme-default/components/SideBar.ts
+++ b/src/client/theme-default/components/SideBar.ts
@@ -136,7 +136,8 @@ function resolveMultiSidebar(
   headers: Header[],
   depth: number
 ): ResolvedSidebar {
-  const item = config[getPathDirName(path)]
+  const paths = [path, Object.keys(config)[0]]
+  const item = paths.map((x) => config[getPathDirName(x)]).find(Boolean)
 
   if (Array.isArray(item)) {
     return resolveArraySidebar(item, depth)