@@ -35,6 +35,7 @@ void DrawAircraftEngine(int left, int ri
extern bool _engine_sort_direction;
extern byte _engine_sort_last_criteria[];
extern bool _engine_sort_last_order[];
extern bool _engine_sort_show_hidden_engines[];
extern const StringID _engine_sort_listing[][12];
extern EngList_SortTypeFunction * const _engine_sort_functions[][11];