diff --git a/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalDateHistogram.java b/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalDateHistogram.java
index 0457ad9e92c..503d3626b2f 100644
--- a/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalDateHistogram.java
+++ b/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalDateHistogram.java
@@ -22,15 +22,10 @@ import org.elasticsearch.common.Nullable;
 import org.elasticsearch.search.aggregations.AggregationExecutionException;
 import org.elasticsearch.search.aggregations.InternalAggregation.Type;
 import org.elasticsearch.search.aggregations.InternalAggregations;
-import org.elasticsearch.search.aggregations.bucket.histogram.InternalHistogram.EmptyBucketInfo;
-import org.elasticsearch.search.aggregations.reducers.Reducer;
 import org.elasticsearch.search.aggregations.support.format.ValueFormatter;
 import org.joda.time.DateTime;
 import org.joda.time.DateTimeZone;
 
-import java.util.List;
-import java.util.Map;
-
 /**
  *
  */
@@ -75,14 +70,6 @@ public class InternalDateHistogram {
             return TYPE.name();
         }
 
-        @Override
-        public InternalHistogram create(String name, List<InternalDateHistogram.Bucket> buckets, InternalOrder order,
- long minDocCount,
-                EmptyBucketInfo emptyBucketInfo, @Nullable ValueFormatter formatter, boolean keyed, List<Reducer> reducers,
-                Map<String, Object> metaData) {
-            return new InternalHistogram(name, buckets, order, minDocCount, emptyBucketInfo, formatter, keyed, this, reducers, metaData);
-        }
-
         @Override
         public InternalDateHistogram.Bucket createBucket(Object key, long docCount, InternalAggregations aggregations, boolean keyed,
                 @Nullable ValueFormatter formatter) {
diff --git a/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalHistogram.java b/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalHistogram.java
index 4171cc3f514..ad17e3796fe 100644
--- a/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalHistogram.java
+++ b/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalHistogram.java
@@ -248,6 +248,11 @@ public class InternalHistogram<B extends InternalHistogram.Bucket> extends Inter
             return new InternalHistogram<>(name, buckets, order, minDocCount, emptyBucketInfo, formatter, keyed, this, reducers, metaData);
         }
 
+        public InternalHistogram<B> create(String name, List<B> buckets, InternalHistogram prototype) {
+            return new InternalHistogram<>(name, buckets, prototype.order, prototype.minDocCount, prototype.emptyBucketInfo,
+                    prototype.formatter, prototype.keyed, this, prototype.reducers(), prototype.metaData);
+        }
+
         public B createBucket(Object key, long docCount, InternalAggregations aggregations, boolean keyed,
                 @Nullable ValueFormatter formatter) {
             if (key instanceof Number) {
@@ -301,10 +306,6 @@ public class InternalHistogram<B extends InternalHistogram.Bucket> extends Inter
         return factory;
     }
 
-    public InternalOrder getOrder() {
-        return order;
-    }
-
     private static class IteratorAndCurrent<B> {
 
         private final Iterator<B> iterator;
diff --git a/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalOrder.java b/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalOrder.java
index 10902064786..9d503a8e90b 100644
--- a/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalOrder.java
+++ b/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/InternalOrder.java
@@ -29,7 +29,7 @@ import java.util.Comparator;
 /**
  * An internal {@link Histogram.Order} strategy which is identified by a unique id.
  */
-public class InternalOrder extends Histogram.Order {
+class InternalOrder extends Histogram.Order {
 
     final byte id;
     final String key;