diff --git a/variables.h b/variables.h
--- a/variables.h
+++ b/variables.h
@@ -89,6 +89,7 @@ typedef struct Patches {
 	bool join_stations;                 // allow joining of train stations
 	bool full_load_any;                 // new full load calculation, any cargo must be full
 	bool improved_load;                 // improved loading algorithm
+	bool gradual_loading;               // load vehicles gradually
 	byte station_spread;                // amount a station may spread
 	bool inflation;                     // disable inflation
 	bool selectgoods;                   // only send the goods to station if a train has been there