diff --git a/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.cpp b/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.cpp
index 0b7c3ddf56d..75bb8710dcd 100644
--- a/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.cpp
+++ b/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.cpp
@@ -11,13 +11,13 @@
 namespace Web::IntersectionObserver {
 
 // https://w3c.github.io/IntersectionObserver/#dom-intersectionobserver-intersectionobserver
-JS::NonnullGCPtr<IntersectionObserver> IntersectionObserver::construct_impl(JS::Realm& realm, WebIDL::CallbackType* callback, IntersectionObserverInit const& options)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<IntersectionObserver>> IntersectionObserver::construct_impl(JS::Realm& realm, WebIDL::CallbackType* callback, IntersectionObserverInit const& options)
 {
     // FIXME: Implement
     (void)callback;
     (void)options;
 
-    return realm.heap().allocate<IntersectionObserver>(realm, realm).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<IntersectionObserver>(realm, realm));
 }
 
 IntersectionObserver::IntersectionObserver(JS::Realm& realm)
diff --git a/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.h b/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.h
index cb10036bece..15325488701 100644
--- a/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.h
+++ b/Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserver.h
@@ -22,7 +22,7 @@ class IntersectionObserver : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(IntersectionObserver, Bindings::PlatformObject);
 
 public:
-    static JS::NonnullGCPtr<IntersectionObserver> construct_impl(JS::Realm&, WebIDL::CallbackType* callback, IntersectionObserverInit const& options = {});
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<IntersectionObserver>> construct_impl(JS::Realm&, WebIDL::CallbackType* callback, IntersectionObserverInit const& options = {});
 
     virtual ~IntersectionObserver() override;