diff --git a/Userland/Libraries/LibWeb/DOM/Document.idl b/Userland/Libraries/LibWeb/DOM/Document.idl
index c86cbc6799..71908af982 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.idl
+++ b/Userland/Libraries/LibWeb/DOM/Document.idl
@@ -18,6 +18,8 @@ interface Document : Node {
 
     readonly attribute USVString referrer;
 
+    readonly attribute Element? activeElement;
+
     Element? getElementById(DOMString id);
     HTMLCollection getElementsByName(DOMString name);
     HTMLCollection getElementsByTagName(DOMString tagName);