diff --git a/Userland/Libraries/LibWeb/DOM/NodeFilter.h b/Userland/Libraries/LibWeb/DOM/NodeFilter.h
index c9f3c3679e..7f8eabe868 100644
--- a/Userland/Libraries/LibWeb/DOM/NodeFilter.h
+++ b/Userland/Libraries/LibWeb/DOM/NodeFilter.h
@@ -21,12 +21,26 @@ public:
 
     WebIDL::CallbackType& callback() { return m_callback; }
 
+    // FIXME: Generate both of these enums from IDL.
     enum Result {
         FILTER_ACCEPT = 1,
         FILTER_REJECT = 2,
         FILTER_SKIP = 3,
     };
 
+    enum class WhatToShow : u32 {
+        SHOW_ALL = 0xFFFFFFFF,
+        SHOW_ELEMENT = 0x1,
+        SHOW_ATTRIBUTE = 0x2,
+        SHOW_TEXT = 0x4,
+        SHOW_CDATA_SECTION = 0x8,
+        SHOW_PROCESSING_INSTRUCTION = 0x40,
+        SHOW_COMMENT = 0x80,
+        SHOW_DOCUMENT = 0x100,
+        SHOW_DOCUMENT_TYPE = 0x200,
+        SHOW_DOCUMENT_FRAGMENT = 0x400,
+    };
+
 private:
     NodeFilter(JS::Realm&, WebIDL::CallbackType&);
 
@@ -35,4 +49,6 @@ private:
     WebIDL::CallbackType& m_callback;
 };
 
+AK_ENUM_BITWISE_OPERATORS(NodeFilter::WhatToShow);
+
 }