Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsFailureMechanismSectionResult.cs
===================================================================
diff -u -r650fc7b43cb6729baee51d079f0377df8d7a3de9 -rb6e0f8d41d92ed18c902138dd49cce6e703ee883
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsFailureMechanismSectionResult.cs	(.../MacroStabilityInwardsFailureMechanismSectionResult.cs)	(revision 650fc7b43cb6729baee51d079f0377df8d7a3de9)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsFailureMechanismSectionResult.cs	(.../MacroStabilityInwardsFailureMechanismSectionResult.cs)	(revision b6e0f8d41d92ed18c902138dd49cce6e703ee883)
@@ -20,7 +20,9 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Base.Data;
 using Ringtoets.Common.Data.FailureMechanism;
+using Ringtoets.Common.Data.Probability;
 
 namespace Ringtoets.MacroStabilityInwards.Data
 {
@@ -36,5 +38,11 @@
         /// <param name="section">The <see cref="FailureMechanismSection"/> to get the result from.</param>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="section"/> is <c>null</c>.</exception>
         public MacroStabilityInwardsFailureMechanismSectionResult(FailureMechanismSection section) : base(section) {}
+
+        protected override RoundedDouble ValidateAssessmentLayerThree(RoundedDouble value)
+        {
+            ProbabilityHelper.ValidateProbability(value, null, true);
+            return value;
+        }
     }
 }
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