1 files changed, 1 insertions, 0 deletions
diff --git a/engine.h b/engine.h
index ccff6c47c..3c5781740 100644
--- a/engine.h
+++ b/engine.h
@@ -21,6 +21,7 @@ typedef struct RailVehicleInfo {
 	byte engclass; // 0: steam, 1: diesel, 2: electric
 	byte capacity;
 	byte cargo_type;
+	byte ai_rank;
 	byte callbackmask; // see CallbackMask enum
 	uint16 pow_wag_power;
 	byte pow_wag_weight;