Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsFailureMechanismView.cs
===================================================================
diff -u -rf9ef294839f02236f8d813b2220ceccc4c2bfc73 -reb62f34afa5651844f4941929c8c3d2b0a1546c1
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsFailureMechanismView.cs	(.../MacroStabilityInwardsFailureMechanismView.cs)	(revision f9ef294839f02236f8d813b2220ceccc4c2bfc73)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsFailureMechanismView.cs	(.../MacroStabilityInwardsFailureMechanismView.cs)	(revision eb62f34afa5651844f4941929c8c3d2b0a1546c1)
@@ -64,6 +64,7 @@
         private Observer failureMechanismObserver;
         private Observer hydraulicBoundaryLocationsObserver;
         private Observer assessmentSectionObserver;
+        private Observer referenceLineObserver;
         private Observer surfaceLinesObserver;
         private Observer stochasticSoilModelsObserver;
 
@@ -135,6 +136,7 @@
         {
             failureMechanismObserver.Dispose();
             assessmentSectionObserver.Dispose();
+            referenceLineObserver.Dispose();
             waterLevelCalculationsForFactorizedSignalingNormObserver.Dispose();
             waterLevelCalculationsForSignalingNormObserver.Dispose();
             waterLevelCalculationsForLowerLimitNormObserver.Dispose();
@@ -205,10 +207,14 @@
             {
                 Observable = FailureMechanism
             };
-            assessmentSectionObserver = new Observer(UpdateAssessmentSectionMapData)
+            assessmentSectionObserver = new Observer(UpdateReferenceLineMapData)
             {
                 Observable = AssessmentSection
             };
+            referenceLineObserver = new Observer(UpdateReferenceLineMapData)
+            {
+                Observable = AssessmentSection.ReferenceLine
+            };
             hydraulicBoundaryLocationsObserver = new Observer(UpdateHydraulicBoundaryLocationsMapData)
             {
                 Observable = AssessmentSection.HydraulicBoundaryDatabase.Locations
@@ -334,7 +340,7 @@
 
         #region AssessmentSection MapData
 
-        private void UpdateAssessmentSectionMapData()
+        private void UpdateReferenceLineMapData()
         {
             SetReferenceLineMapData();
             referenceLineMapData.NotifyObservers();