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-rw-r--r--src/newgrf_engine.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/newgrf_engine.h b/src/newgrf_engine.h
index 017a7e87b..f63b446a6 100644
--- a/src/newgrf_engine.h
+++ b/src/newgrf_engine.h
@@ -46,7 +46,7 @@ bool UsesWagonOverride(const Vehicle *v);
/* Handler to Evaluate callback 36. If the callback fails (i.e. most of the
* time) orig_value is returned */
uint GetVehicleProperty(const Vehicle *v, PropertyID property, uint orig_value);
-uint GetEngineProperty(EngineID engine, PropertyID property, uint orig_value);
+uint GetEngineProperty(EngineID engine, PropertyID property, uint orig_value, const Vehicle *v = NULL);
enum VehicleTrigger {
VEHICLE_TRIGGER_NEW_CARGO = 0x01,