diff --git a/packages/page-controller/src/utils/index.ts b/packages/page-controller/src/utils/index.ts
index 1bcc671..7f651a2 100644
--- a/packages/page-controller/src/utils/index.ts
+++ b/packages/page-controller/src/utils/index.ts
@@ -2,6 +2,7 @@
 // @note instanceof fails for elements inside iframes
 
 export function isHTMLElement(el: unknown): el is HTMLElement {
+	// @todo either specify to HTMLElement or allow Element here.
 	return !!el && (el as Node).nodeType === 1
 }