Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Read/Piping/StochasticSoilProfileEntityReadExtensions.cs
===================================================================
diff -u -ra5714fc0488030773fff50dfc82041c6cb9edc2f -ra294987551b0b2d8a27b6e1bc6235b0e2351b6f4
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Read/Piping/StochasticSoilProfileEntityReadExtensions.cs	(.../StochasticSoilProfileEntityReadExtensions.cs)	(revision a5714fc0488030773fff50dfc82041c6cb9edc2f)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Read/Piping/StochasticSoilProfileEntityReadExtensions.cs	(.../StochasticSoilProfileEntityReadExtensions.cs)	(revision a294987551b0b2d8a27b6e1bc6235b0e2351b6f4)
@@ -52,7 +52,7 @@
                 return collector.Get(entity);
             }
 
-            var profile = new StochasticSoilProfile(Convert.ToDouble(entity.Probability), SoilProfileType.SoilProfile1D, -1)
+            var profile = new StochasticSoilProfile(entity.Probability.ToNullAsNaN(), SoilProfileType.SoilProfile1D, -1)
             {
                 StorageId = entity.StochasticSoilProfileEntityId
             };