Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs
===================================================================
diff -u -r2a0fbe6ec22928831305671ecd4f41030b827250 -re2f91813f3aae8eb2daef6ff1ffac61d197148a8
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 2a0fbe6ec22928831305671ecd4f41030b827250)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision e2f91813f3aae8eb2daef6ff1ffac61d197148a8)
@@ -63,7 +63,7 @@
             {
                 CreateInstance = context => new ClosingStructuresFailureMechanismProperties(
                     context.WrappedData,
-                    new FailureMechanismPropertyChangeHandler<IFailureMechanism>())
+                    new FailureMechanismPropertyChangeHandler<ClosingStructuresFailureMechanism>())
             };
             yield return new PropertyInfo<ClosingStructure, ClosingStructureProperties>();
             yield return new PropertyInfo<ClosingStructuresInputContext, ClosingStructuresInputContextProperties>