Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Primitives/SoilLayerProperties.cs
===================================================================
diff -u -r133ab46a14ee9508c8dd5e4f82381da606076ae0 -r602aa9de93c40ec9ca76e79530d13e7e32b45151
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Primitives/SoilLayerProperties.cs	(.../SoilLayerProperties.cs)	(revision 133ab46a14ee9508c8dd5e4f82381da606076ae0)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Primitives/SoilLayerProperties.cs	(.../SoilLayerProperties.cs)	(revision 602aa9de93c40ec9ca76e79530d13e7e32b45151)
@@ -32,6 +32,14 @@
         private string materialName = string.Empty;
 
         /// <summary>
+        /// Creates a new instance of <see cref="SoilLayerProperties"/>.
+        /// </summary>
+        public SoilLayerProperties()
+        {
+            ShearStrengthModel = MacroStabilityInwardsShearStrengthModel.None;
+        }
+
+        /// <summary>
         /// Gets or sets a value indicating whether the layer is an aquifer.
         /// </summary>
         public bool IsAquifer { get; set; }
@@ -69,7 +77,7 @@
         /// <summary>
         /// Gets or sets the shear strength model to use for the layer.
         /// </summary>
-        public ShearStrengthModel ShearStrengthModel { get; set; }
+        public MacroStabilityInwardsShearStrengthModel ShearStrengthModel { get; set; }
 
         /// <summary>
         /// Gets or sets the mean of the distribution for the volumic weight of the layer above the phreatic level.