diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/labels/entities/Label.java b/navalplanner-business/src/main/java/org/navalplanner/business/labels/entities/Label.java
index 478cc813a..12ac6bae7 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/labels/entities/Label.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/labels/entities/Label.java
@@ -26,7 +26,7 @@ public class Label extends BaseEntity {
     private Set<OrderElement> orderElements;
 
     // Default constructor, needed by Hibernate
-    private Label() {
+    protected Label() {
 
     }
 
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/labels/entities/LabelType.java b/navalplanner-business/src/main/java/org/navalplanner/business/labels/entities/LabelType.java
index 19d111870..344907173 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/labels/entities/LabelType.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/labels/entities/LabelType.java
@@ -21,7 +21,7 @@ public class LabelType extends BaseEntity {
     private Set<Label> labels;
 
     // Default constructor, needed by Hibernate
-    private LabelType() {
+    protected LabelType() {
 
     }