Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Services/HydraRingConfigurationService.cs
===================================================================
diff -u -r365b392c739a678d44c4d0de3c8cb8c3e0684229 -r92ce01ec6a2ac8d64f77a2a618c6b6e410a78812
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Services/HydraRingConfigurationService.cs	(.../HydraRingConfigurationService.cs)	(revision 365b392c739a678d44c4d0de3c8cb8c3e0684229)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Services/HydraRingConfigurationService.cs	(.../HydraRingConfigurationService.cs)	(revision 92ce01ec6a2ac8d64f77a2a618c6b6e410a78812)
@@ -29,6 +29,7 @@
 using Ringtoets.HydraRing.Calculation.Data.Defaults;
 using Ringtoets.HydraRing.Calculation.Data.Input;
 using Ringtoets.HydraRing.Calculation.Data.Settings;
+using Ringtoets.HydraRing.Calculation.Data.Variables;
 using Ringtoets.HydraRing.Calculation.Providers;
 
 namespace Ringtoets.HydraRing.Calculation.Services