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 3e1402e2a..64671346d 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
@@ -37,7 +37,7 @@ public abstract class OrderElement {
 
     public abstract List<HoursGroup> getHoursGroups();
 
-    public long getId() {
+    public Long getId() {
         return id;
     }