diff --git a/ship_cmd.c b/ship_cmd.c
--- a/ship_cmd.c
+++ b/ship_cmd.c
@@ -914,6 +914,7 @@ int32 CmdBuildShip(TileIndex tile, uint3
 		v->random_bits = VehicleRandomBits();
 
 		VehiclePositionChanged(v);
+		GetPlayer(_current_player)->num_engines[p1]++;
 
 		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
 		RebuildVehicleLists();