Index: Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/ICalculation.cs
===================================================================
diff -u -r9b0af3f940ae57b373ab4edfd7da944090255fde -re69c7f4997137a5b3ea5593501f96c1428bbbf13
--- Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/ICalculation.cs	(.../ICalculation.cs)	(revision 9b0af3f940ae57b373ab4edfd7da944090255fde)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/ICalculation.cs	(.../ICalculation.cs)	(revision e69c7f4997137a5b3ea5593501f96c1428bbbf13)
@@ -24,7 +24,7 @@
     /// <summary>
     /// A calculation related object.
     /// </summary>
-    public interface ICalculation : ICalculationBase
+    public interface ICalculation : ICalculatable, ICalculationBase
     {
         /// <summary>
         /// Gets a value indicating whether or not this calculation item contains calculation output.