diff --git a/VectoCore/VectoCore/Models/SimulationComponent/Impl/CycleGearbox.cs b/VectoCore/VectoCore/Models/SimulationComponent/Impl/CycleGearbox.cs
index 558fdaeaf37f8d77947eb7fdf7c8dae23e20040f..28ec611a54de1657a44231655f60751a17b63770 100644
--- a/VectoCore/VectoCore/Models/SimulationComponent/Impl/CycleGearbox.cs
+++ b/VectoCore/VectoCore/Models/SimulationComponent/Impl/CycleGearbox.cs
@@ -141,7 +141,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 		/// </list>
 		/// </returns>
 		public override IResponse Request(Second absTime, Second dt, NewtonMeter outTorque, PerSecond outAngularVelocity,
-			bool dryRun)
+			bool dryRun = false)
 		{
 			Log.Debug("Gearbox Power Request: torque: {0}, angularVelocity: {1}", outTorque, outAngularVelocity);
 			Gear = DataBus.DriverBehavior == DrivingBehavior.Braking