diff --git a/engine/src/flutter/shell/ui/engine.cc b/engine/src/flutter/shell/ui/engine.cc
index 2520b7f61d..8ff836d449 100644
--- a/engine/src/flutter/shell/ui/engine.cc
+++ b/engine/src/flutter/shell/ui/engine.cc
@@ -200,7 +200,8 @@ void Engine::RunFromBundle(const mojo::String& path) {
 
 void Engine::DidCreateIsolate(Dart_Isolate isolate) {
   Internals::Create(isolate,
-                    CreateServiceProvider(config_.service_provider_context));
+                    CreateServiceProvider(config_.service_provider_context),
+                    root_bundle_.Pass());
 }
 
 void Engine::ScheduleFrame() {
diff --git a/engine/src/flutter/shell/ui/internals.cc b/engine/src/flutter/shell/ui/internals.cc
index 039c323a90..e87b7520a0 100644
--- a/engine/src/flutter/shell/ui/internals.cc
+++ b/engine/src/flutter/shell/ui/internals.cc
@@ -29,6 +29,11 @@ Internals* GetInternals() {
 void NotifyTestComplete(Dart_NativeArguments args) {
 }
 
+void TakeRootBundleHandle(Dart_NativeArguments args) {
+  Dart_SetIntegerReturnValue(
+      args, GetInternals()->TakeRootBundleHandle().value());
+}
+
 void TakeShellProxyHandle(Dart_NativeArguments args) {
   Dart_SetIntegerReturnValue(args, 0);
 }
@@ -48,10 +53,11 @@ void TakeServiceRegistry(Dart_NativeArguments args) {
 
 const DartBuiltin::Natives kNativeFunctions[] = {
     {"notifyTestComplete", NotifyTestComplete, 1},
-    {"takeShellProxyHandle", TakeShellProxyHandle, 0},
+    {"takeRootBundleHandle", TakeRootBundleHandle, 0},
+    {"takeServiceRegistry", TakeServiceRegistry, 0},
     {"takeServicesProvidedByEmbedder", TakeServicesProvidedByEmbedder, 0},
     {"takeServicesProvidedToEmbedder", TakeServicesProvidedToEmbedder, 0},
-    {"takeServiceRegistry", TakeServiceRegistry, 0},
+    {"takeShellProxyHandle", TakeShellProxyHandle, 0},
 };
 
 const DartBuiltin& GetBuiltin() {
@@ -75,17 +81,21 @@ const char kLibraryName[] = "dart:sky.internals";
 }  // namespace
 
 void Internals::Create(Dart_Isolate isolate,
-                       mojo::ServiceProviderPtr service_provider) {
+                       mojo::ServiceProviderPtr service_provider,
+                       mojo::asset_bundle::AssetBundlePtr root_bundle) {
   DartState* state = DartState::From(isolate);
-  state->SetUserData(&kInternalsKey, new Internals(service_provider.Pass()));
+  state->SetUserData(&kInternalsKey, new Internals(service_provider.Pass(),
+                                                   root_bundle.Pass()));
   Dart_Handle library =
       Dart_LookupLibrary(Dart_NewStringFromCString(kLibraryName));
   CHECK(!LogIfError(library));
   CHECK(!LogIfError(Dart_SetNativeResolver(library, Resolver, Symbolizer)));
 }
 
-Internals::Internals(mojo::ServiceProviderPtr platform_service_provider)
-  : service_provider_impl_(GetProxy(&service_provider_)),
+Internals::Internals(mojo::ServiceProviderPtr platform_service_provider,
+                     mojo::asset_bundle::AssetBundlePtr root_bundle)
+  : root_bundle_(root_bundle.Pass()),
+    service_provider_impl_(GetProxy(&service_provider_)),
     platform_service_provider_(platform_service_provider.Pass()) {
   service_provider_impl_.set_fallback_service_provider(
       platform_service_provider_.get());
@@ -106,5 +116,9 @@ mojo::Handle Internals::TakeServicesProvidedByEmbedder() {
   return service_provider_.PassInterface().PassHandle().release();
 }
 
+mojo::Handle Internals::TakeRootBundleHandle() {
+  return root_bundle_.PassInterface().PassHandle().release();
+}
+
 }  // namespace shell
 }  // namespace sky
diff --git a/engine/src/flutter/shell/ui/internals.h b/engine/src/flutter/shell/ui/internals.h
index 0244f62353..e2eb38cabb 100644
--- a/engine/src/flutter/shell/ui/internals.h
+++ b/engine/src/flutter/shell/ui/internals.h
@@ -26,18 +26,22 @@ class Internals
   ~Internals() override;
 
   static void Create(Dart_Isolate isolate,
-                     mojo::ServiceProviderPtr platform_service_provider);
+                     mojo::ServiceProviderPtr platform_service_provider,
+                     mojo::asset_bundle::AssetBundlePtr root_bundle);
 
   mojo::Handle TakeServicesProvidedByEmbedder();
+  mojo::Handle TakeRootBundleHandle();
 
  private:
-  explicit Internals(mojo::ServiceProviderPtr platform_service_provider);
+  explicit Internals(mojo::ServiceProviderPtr platform_service_provider,
+                     mojo::asset_bundle::AssetBundlePtr root_bundle);
 
   // |mojo::InterfaceFactory<mojo::asset_bundle::AssetUnpacker>| implementation:
   void Create(
       mojo::ApplicationConnection* connection,
       mojo::InterfaceRequest<mojo::asset_bundle::AssetUnpacker>) override;
 
+  mojo::asset_bundle::AssetBundlePtr root_bundle_;
   mojo::ServiceProviderPtr service_provider_;
   mojo::ServiceProviderImpl service_provider_impl_;
   mojo::ServiceProviderPtr platform_service_provider_;