Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Data/HeightStructuresInput.cs
===================================================================
diff -u -rd5daf17a6ed66dddef590069e4db152f6250c2c3 -ree9ea66795cde20ae1bd8a096333476e49d0d558
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Data/HeightStructuresInput.cs	(.../HeightStructuresInput.cs)	(revision d5daf17a6ed66dddef590069e4db152f6250c2c3)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Data/HeightStructuresInput.cs	(.../HeightStructuresInput.cs)	(revision ee9ea66795cde20ae1bd8a096333476e49d0d558)
@@ -205,7 +205,7 @@
             {
                 if (double.IsNaN(value))
                 {
-                    structureNormalOrientation = (RoundedDouble) double.NaN;
+                    structureNormalOrientation = new RoundedDouble(2, double.NaN);
                     return;
                 }