Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/DesignWaterLevelLocationProperties.cs
===================================================================
diff -u -r0aa226bd935a658e8447c6828496a4e49418e7fb -r03db4c2a6708630d26b6a615620347dc755c50d0
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/DesignWaterLevelLocationProperties.cs	(.../DesignWaterLevelLocationProperties.cs)	(revision 0aa226bd935a658e8447c6828496a4e49418e7fb)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/DesignWaterLevelLocationProperties.cs	(.../DesignWaterLevelLocationProperties.cs)	(revision 03db4c2a6708630d26b6a615620347dc755c50d0)
@@ -38,6 +38,8 @@
     /// </summary>
     public class DesignWaterLevelLocationProperties : HydraulicBoundaryLocationProperties
     {
+        private readonly HydraulicBoundaryLocationCalculation hydraulicBoundaryLocationCalculation;
+
         /// <summary>
         /// Creates a new instance of <see cref="DesignWaterLevelLocationProperties"/>.
         /// </summary>
@@ -47,7 +49,6 @@
         public DesignWaterLevelLocationProperties(HydraulicBoundaryLocation hydraulicBoundaryLocation,
                                                   HydraulicBoundaryLocationCalculation hydraulicBoundaryLocationCalculation)
             : base(hydraulicBoundaryLocation,
-                   hydraulicBoundaryLocationCalculation,
                    new ConstructionProperties
                    {
                        IdIndex = 1,
@@ -57,8 +58,16 @@
                        StochastsIndex = 12,
                        DurationsIndex = 13,
                        IllustrationPointsIndex = 14
-                   }) {}
+                   })
+        {
+            if (hydraulicBoundaryLocationCalculation == null)
+            {
+                throw new ArgumentNullException(nameof(hydraulicBoundaryLocationCalculation));
+            }
 
+            this.hydraulicBoundaryLocationCalculation = hydraulicBoundaryLocationCalculation;
+        }
+
         [PropertyOrder(4)]
         [ResourcesCategory(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.Categories_Result))]
         [ResourcesDisplayName(typeof(Resources), nameof(Resources.HydraulicBoundaryDatabase_Location_DesignWaterLevel_DisplayName))]