Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Providers/VariableDefaultsProvider.cs
===================================================================
diff -u -r8ddc482a3d2978c1526da50c237d514c8b8c6d72 -rc5ccd6966d95178b030cb10b4f154546d51ecf80
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Providers/VariableDefaultsProvider.cs	(.../VariableDefaultsProvider.cs)	(revision 8ddc482a3d2978c1526da50c237d514c8b8c6d72)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Providers/VariableDefaultsProvider.cs	(.../VariableDefaultsProvider.cs)	(revision c5ccd6966d95178b030cb10b4f154546d51ecf80)
@@ -473,6 +473,14 @@
                             136, new VariableDefaults(notApplicableCorrelationLength)
                         }
                     }
+                },
+                {
+                    HydraRingFailureMechanismType.DunesBoundaryConditions, new Dictionary<int, VariableDefaults>
+                    {
+                        {
+                            26, new VariableDefaults(300)
+                        }
+                    }
                 }
             };
         }