diff --git a/invoker.d.ts b/invoker.d.ts
index fb37650..afe75ac 100644
--- a/invoker.d.ts
+++ b/invoker.d.ts
@@ -1,3 +1,5 @@
+export {};
+
 interface InvokerMixin {
   commandForElement: HTMLElement | null;
   command: string;