Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs
===================================================================
diff -u -r8eb717ca45b6518cccfef85e481e0da52ce1df4e -r86bb01b9f86d6a742c8d057187cc246a8d9e2c54
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs	(.../GrassCoverErosionOutwardsPlugin.cs)	(revision 8eb717ca45b6518cccfef85e481e0da52ce1df4e)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs	(.../GrassCoverErosionOutwardsPlugin.cs)	(revision 86bb01b9f86d6a742c8d057187cc246a8d9e2c54)
@@ -36,6 +36,7 @@
 using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.Common.Forms;
+using Ringtoets.Common.Forms.ChangeHandlers;
 using Ringtoets.Common.Forms.GuiServices;
 using Ringtoets.Common.Forms.Helpers;
 using Ringtoets.Common.Forms.PresentationObjects;
@@ -86,7 +87,7 @@
 
             yield return new PropertyInfo<GrassCoverErosionOutwardsWaveConditionsInputContext, GrassCoverErosionOutwardsWaveConditionsInputContextProperties>
             {
-                CreateInstance = context => new GrassCoverErosionOutwardsWaveConditionsInputContextProperties(context)
+                CreateInstance = context => new GrassCoverErosionOutwardsWaveConditionsInputContextProperties(context, new CalculationInputPropertyChangeHandler())
             };
 
             yield return new PropertyInfo<GrassCoverErosionOutwardsDesignWaterLevelLocationContext, GrassCoverErosionOutwardsDesignWaterLevelLocationContextProperties>();