1 files changed, 6 insertions, 1 deletions
diff --git a/flags/src/main/java/com/yahoo/vespa/flags/FlagId.java b/flags/src/main/java/com/yahoo/vespa/flags/FlagId.java
index f004df063ed..ae38fbe7dc1 100644
--- a/flags/src/main/java/com/yahoo/vespa/flags/FlagId.java
+++ b/flags/src/main/java/com/yahoo/vespa/flags/FlagId.java
@@ -9,7 +9,7 @@ import java.util.regex.Pattern;
  * @author hakonhall
  */
 @Immutable
-public class FlagId {
+public class FlagId implements Comparable<FlagId> {
     private static final Pattern ID_PATTERN = Pattern.compile("^[a-zA-Z0-9][a-zA-Z0-9._-]*$");
 
     private final String id;
@@ -23,6 +23,11 @@ public class FlagId {
     }
 
     @Override
+    public int compareTo(FlagId that) {
+        return this.id.compareTo(that.id);
+    }
+
+    @Override
     public String toString() {
         return id;
     }