diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/StretchesFunction.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/StretchesFunction.java
index a9a3e8d41..03e640cf0 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/StretchesFunction.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/StretchesFunction.java
@@ -50,8 +50,20 @@ public class StretchesFunction extends AssignmentFunction {
                         startInclusive, endExclusive, totalHours);
 
             }
+        },
+        INTERPOLATED {
+            @Override
+            public void apply(ResourceAllocation<?> allocation,
+                    List<Interval> intervalsDefinedByStreches,
+                    LocalDate startInclusive, LocalDate endExclusive,
+                    int totalHours) {
+                // by now doing the same than default
+                DEFAULT.apply(allocation, intervalsDefinedByStreches,
+                        startInclusive, endExclusive, totalHours);
+            }
         };
 
+
         public void applyTo(ResourceAllocation<?> resourceAllocation,
                 StretchesFunction stretchesFunction) {
             List<Interval> intervalsDefinedByStreches = stretchesFunction