diff --git a/src/vehicle_base.h b/src/vehicle_base.h
--- a/src/vehicle_base.h
+++ b/src/vehicle_base.h
@@ -44,6 +44,7 @@ enum VehicleFlags {
 	VF_AUTOFILL_TIMETABLE,      ///< Whether the vehicle should fill in the timetable automatically.
 	VF_AUTOFILL_PRES_WAIT_TIME, ///< Whether non-destructive auto-fill should preserve waiting times
 	VF_STOP_LOADING,            ///< Don't load anymore during the next load cycle.
+	VF_PATHFINDER_LOST,         ///< Vehicle's pathfinder is lost.
 };
 
 /** Bit numbers used to indicate which of the #NewGRFCache values are valid. */