diff --git a/packages/circuit-ui/vendor/dialog-polyfill/index.js b/packages/circuit-ui/vendor/dialog-polyfill/index.js
index 955c6aef0c..525e29bded 100644
--- a/packages/circuit-ui/vendor/dialog-polyfill/index.js
+++ b/packages/circuit-ui/vendor/dialog-polyfill/index.js
@@ -1,3 +1,6 @@
+/**
+ * @type {Object}
+ */
 const dialogPolyfill = {};
 
 // This condition assures imports don't break for isomorphic scripts,