diff --git a/Userland/Libraries/LibWeb/DOM/Element.idl b/Userland/Libraries/LibWeb/DOM/Element.idl
index 21a2bfe011..fc7629c723 100644
--- a/Userland/Libraries/LibWeb/DOM/Element.idl
+++ b/Userland/Libraries/LibWeb/DOM/Element.idl
@@ -24,6 +24,9 @@ interface Element : Node {
 
     boolean matches(DOMString selectors);
 
+    // legacy alias of .matches
+    [ImplementedAs=matches] boolean webkitMatchesSelector(DOMString selectors);
+
     readonly attribute Element? nextElementSibling;
     readonly attribute Element? previousElementSibling;