diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/resources/entities/Criterion.java b/navalplanner-business/src/main/java/org/navalplanner/business/resources/entities/Criterion.java
index 627ed7fd8..31dede2e5 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/resources/entities/Criterion.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/resources/entities/Criterion.java
@@ -152,11 +152,11 @@ public class Criterion extends IntegrationEntity implements ICriterion {
         }
     }
 
-    public static String allWorkersCaption() {
+    private static String allWorkersCaption() {
         return _("[generic all workers]");
     }
 
-    public static String allMachinesCaption() {
+    private static String allMachinesCaption() {
         return _("[generic all machines]");
     }