diff --git a/Userland/Libraries/LibWeb/DOM/EventTarget.cpp b/Userland/Libraries/LibWeb/DOM/EventTarget.cpp
index cd2a6256fc..cbbb2644de 100644
--- a/Userland/Libraries/LibWeb/DOM/EventTarget.cpp
+++ b/Userland/Libraries/LibWeb/DOM/EventTarget.cpp
@@ -561,7 +561,7 @@ void EventTarget::activate_event_handler(DeprecatedFlyString const& name, HTML::
     // 5. Let listener be a new event listener whose type is the event handler event type corresponding to eventHandler and callback is callback.
     auto listener = realm.heap().allocate_without_realm<DOMEventListener>();
     listener->type = name;
-    listener->callback = IDLEventListener::create(realm, *callback).ptr();
+    listener->callback = IDLEventListener::create(realm, *callback).release_value_but_fixme_should_propagate_errors();
 
     // 6. Add an event listener with eventTarget and listener.
     add_an_event_listener(*listener);
diff --git a/Userland/Libraries/LibWeb/DOM/IDLEventListener.cpp b/Userland/Libraries/LibWeb/DOM/IDLEventListener.cpp
index bae25528f5..685a7fdcd4 100644
--- a/Userland/Libraries/LibWeb/DOM/IDLEventListener.cpp
+++ b/Userland/Libraries/LibWeb/DOM/IDLEventListener.cpp
@@ -8,9 +8,9 @@
 
 namespace Web::DOM {
 
-JS::NonnullGCPtr<IDLEventListener> IDLEventListener::create(JS::Realm& realm, JS::NonnullGCPtr<WebIDL::CallbackType> callback)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<IDLEventListener>> IDLEventListener::create(JS::Realm& realm, JS::NonnullGCPtr<WebIDL::CallbackType> callback)
 {
-    return realm.heap().allocate<IDLEventListener>(realm, realm, move(callback)).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<IDLEventListener>(realm, realm, move(callback)));
 }
 
 IDLEventListener::IDLEventListener(JS::Realm& realm, JS::NonnullGCPtr<WebIDL::CallbackType> callback)
diff --git a/Userland/Libraries/LibWeb/DOM/IDLEventListener.h b/Userland/Libraries/LibWeb/DOM/IDLEventListener.h
index 8a22c14b4a..eadb1893dd 100644
--- a/Userland/Libraries/LibWeb/DOM/IDLEventListener.h
+++ b/Userland/Libraries/LibWeb/DOM/IDLEventListener.h
@@ -28,7 +28,7 @@ class IDLEventListener final : public JS::Object {
     JS_OBJECT(IDLEventListener, JS::Object);
 
 public:
-    static JS::NonnullGCPtr<IDLEventListener> create(JS::Realm&, JS::NonnullGCPtr<WebIDL::CallbackType>);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<IDLEventListener>> create(JS::Realm&, JS::NonnullGCPtr<WebIDL::CallbackType>);
     IDLEventListener(JS::Realm&, JS::NonnullGCPtr<WebIDL::CallbackType>);
 
     virtual ~IDLEventListener() = default;
diff --git a/Userland/Libraries/LibWeb/DOM/NodeFilter.cpp b/Userland/Libraries/LibWeb/DOM/NodeFilter.cpp
index 4b24bc9f85..a81a25e7a0 100644
--- a/Userland/Libraries/LibWeb/DOM/NodeFilter.cpp
+++ b/Userland/Libraries/LibWeb/DOM/NodeFilter.cpp
@@ -6,12 +6,13 @@
 
 #include <LibJS/Runtime/VM.h>
 #include <LibWeb/DOM/NodeFilter.h>
+#include <LibWeb/WebIDL/ExceptionOr.h>
 
 namespace Web::DOM {
 
-JS::NonnullGCPtr<NodeFilter> NodeFilter::create(JS::Realm& realm, WebIDL::CallbackType& callback)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<NodeFilter>> NodeFilter::create(JS::Realm& realm, WebIDL::CallbackType& callback)
 {
-    return realm.heap().allocate<NodeFilter>(realm, realm, callback).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<NodeFilter>(realm, realm, callback));
 }
 
 NodeFilter::NodeFilter(JS::Realm& realm, WebIDL::CallbackType& callback)
diff --git a/Userland/Libraries/LibWeb/DOM/NodeFilter.h b/Userland/Libraries/LibWeb/DOM/NodeFilter.h
index 754b77f8b8..894919d4ca 100644
--- a/Userland/Libraries/LibWeb/DOM/NodeFilter.h
+++ b/Userland/Libraries/LibWeb/DOM/NodeFilter.h
@@ -15,7 +15,7 @@ class NodeFilter final : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(NodeFilter, Bindings::PlatformObject);
 
 public:
-    static JS::NonnullGCPtr<NodeFilter> create(JS::Realm&, WebIDL::CallbackType&);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<NodeFilter>> create(JS::Realm&, WebIDL::CallbackType&);
 
     virtual ~NodeFilter() = default;