diff --git a/src/vehicle_gui.cpp b/src/vehicle_gui.cpp
--- a/src/vehicle_gui.cpp
+++ b/src/vehicle_gui.cpp
@@ -779,7 +779,7 @@ struct RefitWindow : public Window {
 	{
 		size_t scroll_row = 0;
 		size_t rows = 0;
-		CargoID cargo = this->selected_refit == nullptr ? (CargoID)CT_INVALID : this->selected_refit->cargo;
+		CargoID cargo = this->selected_refit == nullptr ? INVALID_CARGO : this->selected_refit->cargo;
 
 		for (const auto &pair : this->refit_list) {
 			if (pair.first == cargo) {