diff --git a/screen_ui.h b/screen_ui.h
index 293696d..2d6b621 100644
--- a/screen_ui.h
+++ b/screen_ui.h
@@ -114,7 +114,7 @@
   explicit ScreenRecoveryUI(bool scrollable_menu);
 
   bool Init(const std::string& locale) override;
-  std::string GetLocale() override;
+  std::string GetLocale() const override;
 
   // overall recovery state ("background image")
   void SetBackground(Icon icon) override;