diff --git a/typescript/types/layout.d.ts b/typescript/types/layout.d.ts
index 8c5706d0b..6694575d9 100644
--- a/typescript/types/layout.d.ts
+++ b/typescript/types/layout.d.ts
@@ -120,6 +120,6 @@ declare module Layout_ {
       src: Image | (() => Image),
     } | {
       type: "custom",
-      render: (h: Hierarchy) => void,
+      render: (h: RenderedHierarchy) => void,
     };
 }