Index: Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/NormalDistributionProperties.cs
===================================================================
diff -u -r9050ad5f3a80e630b2fcc092942a40d6343286a0 -r68953cc654409e65478d6aa4fb8c1cf44b116d9d
--- Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/NormalDistributionProperties.cs	(.../NormalDistributionProperties.cs)	(revision 9050ad5f3a80e630b2fcc092942a40d6343286a0)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/NormalDistributionProperties.cs	(.../NormalDistributionProperties.cs)	(revision 68953cc654409e65478d6aa4fb8c1cf44b116d9d)
@@ -38,7 +38,7 @@
         /// <summary>
         /// Creates a new read-only instance of <see cref="NormalDistributionProperties"/>.
         /// </summary>
-        public NormalDistributionProperties() : this(DistributionPropertiesReadOnly.All, null) {}
+        public NormalDistributionProperties() : this(DistributionPropertiesReadOnly.All, null, null) {}
 
         /// <summary>
         /// Creates a new instance of <see cref="NormalDistributionProperties"/>.
@@ -47,10 +47,14 @@
         /// marked as read-only.</param>
         /// <param name="observable">The object to be notified of changes to properties.
         /// Can be null if all properties are marked as read-only by <paramref name="propertiesReadOnly"/>.</param>
+        /// <param name="handler">The handler that is used to handle property changes.</param>
         /// <exception cref="ArgumentException">Thrown when <paramref name="observable"/>
         /// is null and any number of properties in this class is editable.</exception>
-        public NormalDistributionProperties(DistributionPropertiesReadOnly propertiesReadOnly, IObservable observable) :
-            base(propertiesReadOnly, observable) {}
+        public NormalDistributionProperties(
+            DistributionPropertiesReadOnly propertiesReadOnly, 
+            IObservable observable,
+            IChangeHandler handler) :
+            base(propertiesReadOnly, observable, handler) {}
 
         public override string DistributionType
         {