diff --git a/types/@html-next/vertical-collection.d.ts b/types/@html-next/vertical-collection.d.ts
index 85f250e..f3cc4f7 100644
--- a/types/@html-next/vertical-collection.d.ts
+++ b/types/@html-next/vertical-collection.d.ts
@@ -26,7 +26,7 @@ export interface VerticalCollectionSignature<T> {
     Element: HTMLElement;
     Args: VerticalCollectionArgs<T>;
     Yields: {
-        default: [T];
+        default: [T, number];
         else: [];
     };
 }