diff --git a/src/vehicle_base.h b/src/vehicle_base.h
--- a/src/vehicle_base.h
+++ b/src/vehicle_base.h
@@ -266,6 +266,8 @@ public:
 	Vehicle **hash_tile_prev;           ///< NOSAVE: Previous vehicle in the tile location hash.
 	Vehicle **hash_tile_current;        ///< NOSAVE: Cache of the current hash chain.
 
+	byte breakdown_severity;            ///< severity of the breakdown. Note that lower means more severe
+	byte breakdown_type;       ///< Type of breakdown
 	SpriteID colourmap;                 ///< NOSAVE: cached colour mapping
 
 	/* Related to age and service time */