Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/SoilProfile/MacroStabilityInwardsSoilLayer1D.cs
===================================================================
diff -u -r85b10b88eb31823c50ca052d34baacc6e006ad4c -r7585d2fd78627d94d55ffa16423af90a91e4efd4
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/SoilProfile/MacroStabilityInwardsSoilLayer1D.cs	(.../MacroStabilityInwardsSoilLayer1D.cs)	(revision 85b10b88eb31823c50ca052d34baacc6e006ad4c)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/SoilProfile/MacroStabilityInwardsSoilLayer1D.cs	(.../MacroStabilityInwardsSoilLayer1D.cs)	(revision 7585d2fd78627d94d55ffa16423af90a91e4efd4)
@@ -19,6 +19,8 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using Ringtoets.MacroStabilityInwards.Primitives;
+
 namespace Ringtoets.MacroStabilityInwards.Data.SoilProfile
 {
     /// <summary>
@@ -33,15 +35,14 @@
         public MacroStabilityInwardsSoilLayer1D(double top)
         {
             Top = top;
-            Data = new MacroStabilityInwardsSoilLayerData();
         }
 
         /// <summary>
         /// Gets the top level of the <see cref="MacroStabilityInwardsSoilLayer1D"/>.
         /// </summary>
         public double Top { get; }
 
-        public MacroStabilityInwardsSoilLayerData Data { get; }
+        public IMacroStabilityInwardsSoilLayerData Data { get; set; }
 
         public override bool Equals(object obj)
         {