1 files changed, 1 insertions, 1 deletions
diff --git a/core/src/main/java/org/elasticsearch/action/admin/indices/upgrade/post/TransportUpgradeAction.java b/core/src/main/java/org/elasticsearch/action/admin/indices/upgrade/post/TransportUpgradeAction.java
index 5e87e91b25..6e172f3e22 100644
--- a/core/src/main/java/org/elasticsearch/action/admin/indices/upgrade/post/TransportUpgradeAction.java
+++ b/core/src/main/java/org/elasticsearch/action/admin/indices/upgrade/post/TransportUpgradeAction.java
@@ -75,7 +75,7 @@ public class TransportUpgradeAction extends TransportBroadcastByNodeAction<Upgra
         Map<String, Tuple<Version, org.apache.lucene.util.Version>> versions = new HashMap<>();
         for (ShardUpgradeResult result : shardUpgradeResults) {
             successfulShards++;
-            String index = result.getShardId().getIndex();
+            String index = result.getShardId().getIndex().getName();
             if (result.primary()) {
                 Integer count = successfulPrimaryShards.get(index);
                 successfulPrimaryShards.put(index, count == null ? 1 : count + 1);