Index: Ringtoets/Common/src/Ringtoets.Common.Data/StructureBase.cs
===================================================================
diff -u -rf765cbda8002f3db4b7855ba9933899f7ebcf820 -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/Common/src/Ringtoets.Common.Data/StructureBase.cs	(.../StructureBase.cs)	(revision f765cbda8002f3db4b7855ba9933899f7ebcf820)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/StructureBase.cs	(.../StructureBase.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Base;
 using Core.Common.Base.Data;
 using Core.Common.Base.Geometry;
 
@@ -28,7 +29,7 @@
     /// <summary>
     /// Base definition of a structure.
     /// </summary>
-    public abstract class StructureBase
+    public abstract class StructureBase : Observable
     {
         /// <summary>
         /// Creates a new instance of <see cref="StructureBase"/>.