diff --git a/src/disaster_vehicle.h b/src/disaster_vehicle.h
index f6a864df9d..3911140527 100644
--- a/src/disaster_vehicle.h
+++ b/src/disaster_vehicle.h
@@ -42,7 +42,7 @@ struct DisasterVehicle final : public SpecializedVehicle<DisasterVehicle, VEH_DI
 
 	/** For use by saveload. */
 	DisasterVehicle() : SpecializedVehicleBase() {}
-	DisasterVehicle(int x, int y, Direction direction, DisasterSubType subtype, VehicleID big_ufo_destroyer_target = VEH_INVALID);
+	DisasterVehicle(int x, int y, Direction direction, DisasterSubType subtype, VehicleID big_ufo_destroyer_target = INVALID_VEHICLE);
 	/** We want to 'destruct' the right class. */
 	virtual ~DisasterVehicle() = default;