diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index f6b3f7e3fc..b96826af74 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -178,7 +178,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<Document>> Document::create_and_initialize(
             Bindings::main_thread_vm(),
             [&](JS::Realm& realm) -> JS::Object* {
                 // - For the global object, create a new Window object.
-                window = HTML::Window::create(realm);
+                window = HTML::Window::create(realm).release_value_but_fixme_should_propagate_errors();
                 return window;
             },
             [&](JS::Realm&) -> JS::Object* {
diff --git a/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp b/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
index ea35da2fd6..0c7230266a 100644
--- a/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
+++ b/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
@@ -118,7 +118,7 @@ JS::NonnullGCPtr<BrowsingContext> BrowsingContext::create_a_new_browsing_context
             browsing_context->m_window_proxy = realm.heap().allocate<WindowProxy>(realm, realm).release_allocated_value_but_fixme_should_propagate_errors();
 
             // - For the global object, create a new Window object.
-            window = HTML::Window::create(realm);
+            window = HTML::Window::create(realm).release_value_but_fixme_should_propagate_errors();
             return window.ptr();
         },
         [&](JS::Realm&) -> JS::Object* {
diff --git a/Userland/Libraries/LibWeb/HTML/Window.cpp b/Userland/Libraries/LibWeb/HTML/Window.cpp
index f301442023..0300b45285 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Window.cpp
@@ -86,9 +86,9 @@ private:
     u32 m_handle { 0 };
 };
 
-JS::NonnullGCPtr<Window> Window::create(JS::Realm& realm)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<Window>> Window::create(JS::Realm& realm)
 {
-    return realm.heap().allocate<Window>(realm, realm).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<Window>(realm, realm));
 }
 
 Window::Window(JS::Realm& realm)
diff --git a/Userland/Libraries/LibWeb/HTML/Window.h b/Userland/Libraries/LibWeb/HTML/Window.h
index 1944ec9fa2..7e2c69a034 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.h
+++ b/Userland/Libraries/LibWeb/HTML/Window.h
@@ -37,7 +37,7 @@ class Window final
     WEB_PLATFORM_OBJECT(Window, DOM::EventTarget);
 
 public:
-    static JS::NonnullGCPtr<Window> create(JS::Realm&);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<Window>> create(JS::Realm&);
 
     ~Window();