Index: Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Creators/FailureMechanismAssemblyCreator.cs
===================================================================
diff -u -recd4e132deb2683aadc0f83f0853dc1b79602033 -rea237aa9ec7893e681cfc3e2aa0cb94c2e866ee1
--- Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Creators/FailureMechanismAssemblyCreator.cs	(.../FailureMechanismAssemblyCreator.cs)	(revision ecd4e132deb2683aadc0f83f0853dc1b79602033)
+++ Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Creators/FailureMechanismAssemblyCreator.cs	(.../FailureMechanismAssemblyCreator.cs)	(revision ea237aa9ec7893e681cfc3e2aa0cb94c2e866ee1)
@@ -49,7 +49,7 @@
                 throw new ArgumentNullException(nameof(result));
             }
 
-            return new FailureMechanismAssembly(result.FailureProbability ?? double.NaN,
+            return new FailureMechanismAssembly(result.FailureProbability,
                                                 CreateFailureMechanismAssemblyCategoryGroup(result.Category));
         }