Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationService.cs
===================================================================
diff -u -r7d4fdb527410c89577828ea5d84896945341bae8 -r1a6804681b0758a5761e39099e4b6de65f9cf4a2
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationService.cs	(.../HeightStructuresCalculationService.cs)	(revision 7d4fdb527410c89577828ea5d84896945341bae8)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationService.cs	(.../HeightStructuresCalculationService.cs)	(revision 1a6804681b0758a5761e39099e4b6de65f9cf4a2)
@@ -195,7 +195,7 @@
 
                 if (IsInvalidNumber(inputParameters.DeviationWaveDirection))
                 {
-                    validationResult.Add(string.Format(RingtoetsCommonServiceResources.CalculationService_ValidateInput_Value_for_0_must_be_a_valid_number,
+                    validationResult.Add(string.Format(RingtoetsCommonServiceResources.Validation_ValidateInput_No_value_entered_for_0_,
                                                        GenerateParameterNameWithoutUnits(RingtoetsCommonFormsResources.Structure_DeviationWaveDirection_DisplayName)));
                 }