diff --git a/server/src/main/java/org/elasticsearch/action/search/SearchPhaseController.java b/server/src/main/java/org/elasticsearch/action/search/SearchPhaseController.java
index b3562cc002b5b..43cbdfbeba143 100644
--- a/server/src/main/java/org/elasticsearch/action/search/SearchPhaseController.java
+++ b/server/src/main/java/org/elasticsearch/action/search/SearchPhaseController.java
@@ -636,7 +636,11 @@ private synchronized void consumeInternal(QuerySearchResult querySearchResult) {
                 numReducePhases++;
                 index = 1;
                 if (hasAggs) {
-                    progressListener.notifyPartialReduce(progressListener.searchShards(results.asList()),
+                    List<SearchPhaseResult> results = new ArrayList<>();
+                    for (int i = 0; i < this.results.length(); i++) {
+                        results.add(this.results.get(i));
+                    }
+                    progressListener.notifyPartialReduce(progressListener.searchShards(results),
                         topDocsStats.getTotalHits(), aggsBuffer[0], numReducePhases);
                 }
             }