diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderElement.java b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderElement.java
index 78d21422f..ef0ca638d 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderElement.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderElement.java
@@ -39,6 +39,7 @@ import org.navalplanner.business.advance.bootstrap.PredefinedAdvancedTypes;
 import org.navalplanner.business.advance.entities.AdvanceAssignment;
 import org.navalplanner.business.advance.entities.AdvanceType;
 import org.navalplanner.business.advance.entities.DirectAdvanceAssignment;
+import org.navalplanner.business.advance.entities.IndirectAdvanceAssignment;
 import org.navalplanner.business.advance.exceptions.DuplicateAdvanceAssignmentForOrderElementException;
 import org.navalplanner.business.advance.exceptions.DuplicateValueTrueReportGlobalAdvanceException;
 import org.navalplanner.business.common.BaseEntity;
@@ -497,6 +498,8 @@ public abstract class OrderElement extends BaseEntity implements
 
     public abstract BigDecimal getAdvancePercentage(LocalDate date);
 
+    public abstract Set<IndirectAdvanceAssignment> getIndirectAdvanceAssignments();
+
     public List<OrderElement> getAllChildren() {
         List<OrderElement> children = getChildren();
         List<OrderElement> result = new ArrayList<OrderElement>(children);
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLine.java b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLine.java
index aa7bc235b..580f15349 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLine.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLine.java
@@ -24,6 +24,7 @@ import static org.navalplanner.business.i18n.I18nHelper._;
 
 import java.math.BigDecimal;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -34,6 +35,7 @@ import org.hibernate.validator.Valid;
 import org.joda.time.LocalDate;
 import org.navalplanner.business.advance.entities.AdvanceType;
 import org.navalplanner.business.advance.entities.DirectAdvanceAssignment;
+import org.navalplanner.business.advance.entities.IndirectAdvanceAssignment;
 import org.navalplanner.business.requirements.entities.CriterionRequirement;
 import org.navalplanner.business.requirements.entities.DirectCriterionRequirement;
 import org.navalplanner.business.templates.entities.OrderLineTemplate;
@@ -542,4 +544,9 @@ public class OrderLine extends OrderElement {
         return OrderLineTemplate.create(this);
     }
 
+    @Override
+    public Set<IndirectAdvanceAssignment> getIndirectAdvanceAssignments() {
+        return Collections.emptySet();
+    }
+
 }
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLineGroup.java b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLineGroup.java
index e1d3b3b9d..ddab22cf7 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLineGroup.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/OrderLineGroup.java
@@ -673,6 +673,7 @@ public class OrderLineGroup extends OrderElement implements
         return result;
     }
 
+    @Override
     public Set<IndirectAdvanceAssignment> getIndirectAdvanceAssignments() {
         return Collections.unmodifiableSet(indirectAdvanceAssignments);
     }