1 files changed, 16 insertions, 1 deletions
diff --git a/container-search/src/main/java/com/yahoo/search/grouping/request/MathPowFunction.java b/container-search/src/main/java/com/yahoo/search/grouping/request/MathPowFunction.java
index ab0d6ba2139..084fdc82646 100644
--- a/container-search/src/main/java/com/yahoo/search/grouping/request/MathPowFunction.java
+++ b/container-search/src/main/java/com/yahoo/search/grouping/request/MathPowFunction.java
@@ -5,8 +5,10 @@ import java.util.Arrays;
 
 /**
  * @author baldersheim
+ * @author bratseth
  */
 public class MathPowFunction extends FunctionNode {
+
     /**
      * Constructs a new instance of this class.
      *
@@ -14,6 +16,19 @@ public class MathPowFunction extends FunctionNode {
      * @param y The expression to evaluate for the exponent, double value will be requested.
      */
     public MathPowFunction(GroupingExpression x, GroupingExpression y) {
-        super("math.pow", Arrays.asList(x,y));
+        this(null, null, x, y);
+    }
+
+    private MathPowFunction(String label, Integer level, GroupingExpression x, GroupingExpression y) {
+        super("math.pow", label, level, Arrays.asList(x, y));
     }
+
+    @Override
+    public MathPowFunction copy() {
+        return new MathPowFunction(getLabel(),
+                                   getLevelOrNull(),
+                                   getArg(0).copy(),
+                                   getArg(1).copy());
+    }
+
 }