diff --git a/Libraries/LibWeb/DOM/Element.idl b/Libraries/LibWeb/DOM/Element.idl
index e698841c84..f586296c5d 100644
--- a/Libraries/LibWeb/DOM/Element.idl
+++ b/Libraries/LibWeb/DOM/Element.idl
@@ -8,5 +8,8 @@ interface Element : Node {
     attribute DOMString innerHTML;
     [Reflect] attribute DOMString id;
     [Reflect=class] attribute DOMString className;
+
+    readonly attribute Element? nextElementSibling;
+    readonly attribute Element? previousElementSibling;
 }