diff --git a/incremental-dom/incremental-dom.d.ts b/incremental-dom/incremental-dom.d.ts
index a9f3dc27fd..18fdd15597 100644
--- a/incremental-dom/incremental-dom.d.ts
+++ b/incremental-dom/incremental-dom.d.ts
@@ -57,7 +57,7 @@ declare module "incremental-dom" {
     /**
      * Closes an open virtual Element.
      */
-    export var elementClose: () => void;
+    export var elementClose: (tag: string) => void;
     /**
      * Declares a virtual Element at the current location in the document that has
      * no children.