--- a/src/articulated_vehicles.h	Thu Dec 27 13:25:23 2007 +0000
+++ b/src/articulated_vehicles.h	Thu Dec 27 13:35:39 2007 +0000
@@ -5,6 +5,8 @@
 #ifndef ARTICULATED_VEHICLES_H
 #define ARTICULATED_VEHICLES_H
 
+#include "vehicle_type.h"
+
 uint CountArticulatedParts(EngineID engine_type, bool purchase_window);
 void AddArticulatedParts(Vehicle **vl, VehicleType type);