Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/GrassCoverErosionInwardsOvertoppingOutputProperties.cs
===================================================================
diff -u -r4bec3b502ee113f44794e9c476a6b4c98b0be167 -r13a669fc8333d93a997aa54f6037f0592da1cd96
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/GrassCoverErosionInwardsOvertoppingOutputProperties.cs	(.../GrassCoverErosionInwardsOvertoppingOutputProperties.cs)	(revision 4bec3b502ee113f44794e9c476a6b4c98b0be167)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PropertyClasses/GrassCoverErosionInwardsOvertoppingOutputProperties.cs	(.../GrassCoverErosionInwardsOvertoppingOutputProperties.cs)	(revision 13a669fc8333d93a997aa54f6037f0592da1cd96)
@@ -123,7 +123,7 @@
         [DynamicVisibleValidationMethod]
         public bool DynamicVisibleValidationMethod(string propertyName)
         {
-            return !double.IsNaN(data.WaveHeight);
+            return data.HasWaveHeight;
         }
     }
 }
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