1 files changed, 11 insertions, 1 deletions
diff --git a/container-search/src/main/java/com/yahoo/search/grouping/request/RelevanceValue.java b/container-search/src/main/java/com/yahoo/search/grouping/request/RelevanceValue.java
index 01735c0bdab..30cdf2c6f5c 100644
--- a/container-search/src/main/java/com/yahoo/search/grouping/request/RelevanceValue.java
+++ b/container-search/src/main/java/com/yahoo/search/grouping/request/RelevanceValue.java
@@ -6,6 +6,7 @@ package com.yahoo.search.grouping.request;
  * the input {@link com.yahoo.search.result.Hit}.
  *
  * @author Simon Thoresen Hult
+ * @author bratseth
  */
 public class RelevanceValue extends DocumentValue {
 
@@ -13,7 +14,16 @@ public class RelevanceValue extends DocumentValue {
      * Constructs a new instance of this class.
      */
     public RelevanceValue() {
-        super("relevance()");
+        this(null, null);
+    }
+
+    private RelevanceValue(String label, Integer level) {
+        super("relevance()", label, level);
+    }
+
+    @Override
+    public RelevanceValue copy() {
+        return new RelevanceValue(getLabel(), getLevelOrNull());
     }
 
 }