diff --git a/src/engine.cpp b/src/engine.cpp
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -85,8 +85,8 @@ Engine::Engine(VehicleType type, EngineI
 		this->info.base_life = 0xFF;
 		/* Set road vehicle tractive effort to the default value */
 		if (type == VEH_ROAD) this->u.road.tractive_effort = 0x4C;
-		/* Aircraft must have CT_INVALID as default, as there is no property */
-		if (type == VEH_AIRCRAFT) this->info.cargo_type = CT_INVALID;
+		/* Aircraft must have INVALID_CARGO as default, as there is no property */
+		if (type == VEH_AIRCRAFT) this->info.cargo_type = INVALID_CARGO;
 		/* Set visual effect to the default value */
 		switch (type) {
 			case VEH_TRAIN: this->u.rail.visual_effect = VE_DEFAULT; break;