diff --git a/Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp b/Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp
index ff519dafeb5..aad7f31c787 100644
--- a/Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp
+++ b/Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp
@@ -52,10 +52,10 @@ inline void replace_in_ordered_set(Vector<DeprecatedString>& set, StringView ite
 
 namespace Web::DOM {
 
-DOMTokenList* DOMTokenList::create(Element const& associated_element, DeprecatedFlyString associated_attribute)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMTokenList>> DOMTokenList::create(Element const& associated_element, DeprecatedFlyString associated_attribute)
 {
     auto& realm = associated_element.realm();
-    return realm.heap().allocate<DOMTokenList>(realm, associated_element, move(associated_attribute)).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<DOMTokenList>(realm, associated_element, move(associated_attribute)));
 }
 
 // https://dom.spec.whatwg.org/#ref-for-domtokenlist%E2%91%A0%E2%91%A2
diff --git a/Userland/Libraries/LibWeb/DOM/DOMTokenList.h b/Userland/Libraries/LibWeb/DOM/DOMTokenList.h
index 60dda71782c..79b2daac1ff 100644
--- a/Userland/Libraries/LibWeb/DOM/DOMTokenList.h
+++ b/Userland/Libraries/LibWeb/DOM/DOMTokenList.h
@@ -23,7 +23,7 @@ class DOMTokenList final : public Bindings::LegacyPlatformObject {
     WEB_PLATFORM_OBJECT(DOMTokenList, Bindings::LegacyPlatformObject);
 
 public:
-    static DOMTokenList* create(Element const& associated_element, DeprecatedFlyString associated_attribute);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<DOMTokenList>> create(Element const& associated_element, DeprecatedFlyString associated_attribute);
     ~DOMTokenList() = default;
 
     void associated_attribute_changed(StringView value);
diff --git a/Userland/Libraries/LibWeb/DOM/Element.cpp b/Userland/Libraries/LibWeb/DOM/Element.cpp
index 614b4af169a..69f1eabcb87 100644
--- a/Userland/Libraries/LibWeb/DOM/Element.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Element.cpp
@@ -455,7 +455,7 @@ NonnullRefPtr<CSS::StyleProperties> Element::resolved_css_values()
 DOMTokenList* Element::class_list()
 {
     if (!m_class_list)
-        m_class_list = DOMTokenList::create(*this, HTML::AttributeNames::class_);
+        m_class_list = DOMTokenList::create(*this, HTML::AttributeNames::class_).release_value_but_fixme_should_propagate_errors();
     return m_class_list;
 }