diff --git a/index.d.ts b/index.d.ts
index ef87173..48dda6a 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -7,4 +7,7 @@ declare global {
   interface Window {
     DetailsMenuElement: typeof DetailsMenuElement
   }
-}
+  interface HTMLElementTagNameMap {
+    'details-menu': DetailsMenuElement
+  }
+}
\ No newline at end of file