Index: Ringtoets/Storage/src/Ringtoets.Storage.Core/Serializers/RoughnessPointXmlSerializer.cs
===================================================================
diff -u -r92a7d5fbc462aa16be6eba11ba9e7b54fcd38622 -rafc85625decd7e21fc46145a5ed89dd28b807e7b
--- Ringtoets/Storage/src/Ringtoets.Storage.Core/Serializers/RoughnessPointXmlSerializer.cs	(.../RoughnessPointXmlSerializer.cs)	(revision 92a7d5fbc462aa16be6eba11ba9e7b54fcd38622)
+++ Ringtoets/Storage/src/Ringtoets.Storage.Core/Serializers/RoughnessPointXmlSerializer.cs	(.../RoughnessPointXmlSerializer.cs)	(revision afc85625decd7e21fc46145a5ed89dd28b807e7b)
@@ -22,6 +22,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Runtime.Serialization;
 using Core.Common.Base.Geometry;
 using Ringtoets.Common.Data.DikeProfiles;
 
@@ -44,10 +45,16 @@
         }
 
         [Serializable]
+        [DataContract(Name = nameof(SerializableRoughnessPoint), Namespace = "")]
         internal class SerializableRoughnessPoint
         {
+            [DataMember]
             private readonly double x;
+
+            [DataMember]
             private readonly double y;
+
+            [DataMember]
             private readonly double roughness;
 
             public SerializableRoughnessPoint(RoughnessPoint point)
Index: Ringtoets/Storage/test/Ringtoets.Storage.Core.Test/Serializers/RoughnessPointXmlSerializerTest.cs
===================================================================
diff -u -rff51075f9bb18ac60d0ab4de5aa50dc87fe73554 -rafc85625decd7e21fc46145a5ed89dd28b807e7b
--- Ringtoets/Storage/test/Ringtoets.Storage.Core.Test/Serializers/RoughnessPointXmlSerializerTest.cs	(.../RoughnessPointXmlSerializerTest.cs)	(revision ff51075f9bb18ac60d0ab4de5aa50dc87fe73554)
+++ Ringtoets/Storage/test/Ringtoets.Storage.Core.Test/Serializers/RoughnessPointXmlSerializerTest.cs	(.../RoughnessPointXmlSerializerTest.cs)	(revision afc85625decd7e21fc46145a5ed89dd28b807e7b)
@@ -24,6 +24,7 @@
 using NUnit.Framework;
 using Ringtoets.Common.Data.DikeProfiles;
 using Ringtoets.Storage.Core.Serializers;
+using Ringtoets.Storage.Core.TestUtil.Serializers;
 
 namespace Ringtoets.Storage.Core.Test.Serializers
 {
@@ -38,6 +39,7 @@
 
             // Assert
             Assert.IsInstanceOf<DataCollectionSerializer<RoughnessPoint, RoughnessPointXmlSerializer.SerializableRoughnessPoint>>(serializer);
+            SerializerTestHelper.AssertSerializedData<RoughnessPointXmlSerializer.SerializableRoughnessPoint>();
         }
 
         [Test]