diff --git a/Source/Orts.Simulation/Simulation/RollingStocks/MSTSControlTrailerCar.cs b/Source/Orts.Simulation/Simulation/RollingStocks/MSTSControlTrailerCar.cs
index 674119cca8..611842aada 100644
--- a/Source/Orts.Simulation/Simulation/RollingStocks/MSTSControlTrailerCar.cs
+++ b/Source/Orts.Simulation/Simulation/RollingStocks/MSTSControlTrailerCar.cs
@@ -128,6 +128,7 @@ public override void Copy(MSTSWagon copy)
         /// </summary>
         public override void Save(BinaryWriter outf)
         {
+            base.Save(outf);
             ControllerFactory.Save(GearBoxController, outf);
             outf.Write(ControlGearIndication);
             outf.Write(ControlGearIndex);