Index: Ringtoets/Piping/src/Ringtoets.Piping.Primitives/RingtoetsPipingSurfaceLine.cs
===================================================================
diff -u -r54e6baff4fab535777949f737314f052853e818a -r93ca6aa3bd94ccb82da7d62f13cc9fa009f1443c
--- Ringtoets/Piping/src/Ringtoets.Piping.Primitives/RingtoetsPipingSurfaceLine.cs	(.../RingtoetsPipingSurfaceLine.cs)	(revision 54e6baff4fab535777949f737314f052853e818a)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Primitives/RingtoetsPipingSurfaceLine.cs	(.../RingtoetsPipingSurfaceLine.cs)	(revision 93ca6aa3bd94ccb82da7d62f13cc9fa009f1443c)
@@ -39,6 +39,8 @@
     /// </summary>
     public class RingtoetsPipingSurfaceLine : IStorable
     {
+        private Point3D[] geometryPoints;
+
         /// <summary>
         /// Initializes a new instance of the <see cref="RingtoetsPipingSurfaceLine"/> class.
         /// </summary>