Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs
===================================================================
diff -u -r167493b614f6802d9771dca9997b11dcc5c64a83 -r7947681ebba776d55c4f78782360256800fa5d1f
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 167493b614f6802d9771dca9997b11dcc5c64a83)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 7947681ebba776d55c4f78782360256800fa5d1f)
@@ -515,8 +515,13 @@
                    .AddExportItem()
                    .AddSeparator();
 
-            if (!isNestedGroup)
+            if (isNestedGroup)
             {
+                builder.AddDuplicateCalculationItem(group, context)
+                       .AddSeparator();
+            }
+            else
+            {
                 builder.AddCustomItem(CreateGenerateClosingStructuresCalculationsItem(context))
                        .AddSeparator();
             }