diff --git a/runtime/runtime_controller.h b/runtime/runtime_controller.h
index d70bb177c8131c9467f2ebc0538834858704acb0..c337c724b8079877bf812ff1c3e7aa831f02107a 100644
--- a/runtime/runtime_controller.h
+++ b/runtime/runtime_controller.h
@@ -66,8 +66,8 @@ class RuntimeController : public WindowClient, public IsolateClient {
   void DidShutdownMainIsolate() override;
 
   RuntimeDelegate* client_;
-  std::string language_code_;
-  std::string country_code_;
+  std::string language_code_ = "en";
+  std::string country_code_ = "US";
   std::string user_settings_data_ = "{}";
   bool semantics_enabled_ = false;
   std::unique_ptr<DartController> dart_controller_;
diff --git a/shell/common/engine.cc b/shell/common/engine.cc
index 9f63afdf0ef7ad1fe120ca785a77e2cde2335685..f779143df488aaf0e102bf13b782937d2b0f4d51 100644
--- a/shell/common/engine.cc
+++ b/shell/common/engine.cc
@@ -118,6 +118,8 @@ Engine::Engine(PlatformView* platform_view)
           platform_view->GetVsyncWaiter(),
           this)),
       load_script_error_(tonic::kNoError),
+      language_code_("en"),
+      country_code_("US"),
       user_settings_data_("{}"),
       activity_running_(false),
       have_surface_(false),