diff --git a/packages/island/src/theme-default/logic/useSidebarData.ts b/packages/island/src/theme-default/logic/useSidebarData.ts
index 7ae208e..3f3888b 100644
--- a/packages/island/src/theme-default/logic/useSidebarData.ts
+++ b/packages/island/src/theme-default/logic/useSidebarData.ts
@@ -10,6 +10,8 @@ interface SidebarData {
 }
 
 export function useSidebarData(currentPathname: string): SidebarData {
+  currentPathname = decodeURIComponent(currentPathname);
+
   const localeData = useLocaleSiteData();
   const sidebar = localeData.sidebar ?? {};
   for (const name of Object.keys(sidebar)) {