Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/FailureMechanismContributionNormChangeHandler.cs
===================================================================
diff -u -r9a001397536d9dcca5d009c8518478cdfcddbeca -r11949f071abdcebaadf757c53a34b93299aefbaa
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/FailureMechanismContributionNormChangeHandler.cs	(.../FailureMechanismContributionNormChangeHandler.cs)	(revision 9a001397536d9dcca5d009c8518478cdfcddbeca)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/FailureMechanismContributionNormChangeHandler.cs	(.../FailureMechanismContributionNormChangeHandler.cs)	(revision 11949f071abdcebaadf757c53a34b93299aefbaa)
@@ -27,6 +27,7 @@
 using log4net;
 using Ringtoets.Common.Data.AssessmentSection;
 using Ringtoets.Common.Data.Contribution;
+using Ringtoets.DuneErosion.Data;
 using Ringtoets.GrassCoverErosionOutwards.Data;
 using Ringtoets.Integration.Forms.PropertyClasses;
 using Ringtoets.Integration.Plugin.Properties;
@@ -93,15 +94,20 @@
                                                                                                                    .OfType<GrassCoverErosionOutwardsFailureMechanism>()
                                                                                                                    .First();
 
+            DuneErosionFailureMechanism duneErosionFailureMechanism = assessmentSection.GetFailureMechanisms()
+                                                                                       .OfType<DuneErosionFailureMechanism>()
+                                                                                       .First();
+
             IEnumerable<IObservable> hydraulicBoundaryLocationAffected = RingtoetsDataSynchronizationService.ClearHydraulicBoundaryLocationOutput(
-                assessmentSection.HydraulicBoundaryDatabase, grassCoverErosionOutwardsFailureMechanism);
+                assessmentSection.HydraulicBoundaryDatabase, grassCoverErosionOutwardsFailureMechanism, duneErosionFailureMechanism);
             if (hydraulicBoundaryLocationAffected.Any())
             {
                 log.Info(Resources.FailureMechanismContributionNormChangeHandler_Waveheight_and_design_water_level_results_cleared);
                 return new IObservable[]
                 {
                     grassCoverErosionOutwardsFailureMechanism.HydraulicBoundaryLocations,
-                    assessmentSection.HydraulicBoundaryDatabase
+                    assessmentSection.HydraulicBoundaryDatabase,
+                    duneErosionFailureMechanism.DuneLocations
                 };
             }
             return Enumerable.Empty<IObservable>();