--- a/src/newgrf_engine.h	Fri Apr 20 21:21:47 2007 +0000
+++ b/src/newgrf_engine.h	Fri Apr 20 21:42:06 2007 +0000
@@ -38,6 +38,7 @@
 /* Handler to Evaluate callback 36. If the callback fails (i.e. most of the
  * time) orig_value is returned */
 uint GetVehicleProperty(const Vehicle *v, uint8 property, uint orig_value);
+uint GetEngineProperty(EngineID engine, uint8 property, uint orig_value);
 
 enum VehicleTrigger {
 	VEHICLE_TRIGGER_NEW_CARGO     = 1,