diff --git a/src/shared/shared.ts b/src/shared/shared.ts
index d0d91cfe2..dade94d29 100644
--- a/src/shared/shared.ts
+++ b/src/shared/shared.ts
@@ -30,7 +30,7 @@ const UnpackStackView = Symbol('stack-view:unpack')
 
 const HASH_WITHOUT_FRAGMENT_RE = /#.*?(?=:~:|$)/
 const HASH_OR_QUERY_RE = /[?#].*$/
-const INDEX_OR_EXT_RE = /(?:(^|\/)index)?\.(?:md|html)$/
+const INDEX_OR_EXT_RE = /(?:(^|\/)index)?(?:\.(?:md|html))?$/
 
 export const inBrowser = typeof document !== 'undefined'