diff --git a/Userland/Libraries/LibWeb/HTML/Window.cpp b/Userland/Libraries/LibWeb/HTML/Window.cpp
index 65aa384bb44..d7eca709a62 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Window.cpp
@@ -897,7 +897,6 @@ WebIDL::ExceptionOr<void> Window::initialize_web_interfaces(Badge<WindowEnvironm
 
     define_direct_property("CSS", MUST_OR_THROW_OOM(heap().allocate<Bindings::CSSNamespace>(realm, realm)), 0);
 
-    define_native_accessor(realm, "localStorage", local_storage_getter, {}, attr);
     define_native_accessor(realm, "sessionStorage", session_storage_getter, {}, attr);
 
     // FIXME: Implement codegen for readonly properties with [PutForwards]
@@ -1619,12 +1618,6 @@ JS_DEFINE_NATIVE_FUNCTION(Window::structured_clone)
     }));
 }
 
-JS_DEFINE_NATIVE_FUNCTION(Window::local_storage_getter)
-{
-    auto* impl = TRY(impl_from(vm));
-    return impl->local_storage();
-}
-
 JS_DEFINE_NATIVE_FUNCTION(Window::session_storage_getter)
 {
     auto* impl = TRY(impl_from(vm));
diff --git a/Userland/Libraries/LibWeb/HTML/Window.h b/Userland/Libraries/LibWeb/HTML/Window.h
index 1b32aafa529..df9f22e31b2 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.h
+++ b/Userland/Libraries/LibWeb/HTML/Window.h
@@ -253,7 +253,6 @@ private:
 
     JS_DECLARE_NATIVE_FUNCTION(structured_clone);
 
-    JS_DECLARE_NATIVE_FUNCTION(local_storage_getter);
     JS_DECLARE_NATIVE_FUNCTION(session_storage_getter);
 
     JS_DECLARE_NATIVE_FUNCTION(set_interval);
diff --git a/Userland/Libraries/LibWeb/HTML/Window.idl b/Userland/Libraries/LibWeb/HTML/Window.idl
index ed2d7997da9..48f42dd438e 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.idl
+++ b/Userland/Libraries/LibWeb/HTML/Window.idl
@@ -7,6 +7,7 @@
 #import <HighResolutionTime/Performance.idl>
 #import <HTML/AnimationFrameProvider.idl>
 #import <HTML/Navigator.idl>
+#import <HTML/WindowLocalStorage.idl>
 #import <HTML/WindowOrWorkerGlobalScope.idl>
 #import <RequestIdleCallback/IdleRequest.idl>
 
@@ -96,6 +97,7 @@ interface Window : EventTarget {
 Window includes AnimationFrameProvider;
 Window includes GlobalEventHandlers;
 Window includes WindowEventHandlers;
+Window includes WindowLocalStorage;
 Window includes WindowOrWorkerGlobalScope;
 
 enum ScrollBehavior { "auto", "instant", "smooth" };
diff --git a/Userland/Libraries/LibWeb/HTML/WindowLocalStorage.idl b/Userland/Libraries/LibWeb/HTML/WindowLocalStorage.idl
new file mode 100644
index 00000000000..8bed5e295ba
--- /dev/null
+++ b/Userland/Libraries/LibWeb/HTML/WindowLocalStorage.idl
@@ -0,0 +1,6 @@
+#import <HTML/Storage.idl>
+
+// https://html.spec.whatwg.org/multipage/webstorage.html#windowlocalstorage
+interface mixin WindowLocalStorage {
+    readonly attribute Storage localStorage;
+};