Index: Ringtoets/Revetment/src/Ringtoets.Revetment.Data/WaveConditionsInput.cs
===================================================================
diff -u -r974fb1eadbd8a630c7a992648ad42ac85ec205b1 -rcc8b9d8e93577a236afec4dd16a25f89996241fa
--- Ringtoets/Revetment/src/Ringtoets.Revetment.Data/WaveConditionsInput.cs	(.../WaveConditionsInput.cs)	(revision 974fb1eadbd8a630c7a992648ad42ac85ec205b1)
+++ Ringtoets/Revetment/src/Ringtoets.Revetment.Data/WaveConditionsInput.cs	(.../WaveConditionsInput.cs)	(revision cc8b9d8e93577a236afec4dd16a25f89996241fa)
@@ -80,7 +80,7 @@
         {
             get
             {
-                return HydraulicBoundaryLocation != null ? HydraulicBoundaryLocation.DesignWaterLevel : new RoundedDouble(2, double.NaN);
+                return HydraulicBoundaryLocation?.DesignWaterLevel ?? new RoundedDouble(2, double.NaN);
             }
         }