diff --git a/lib/Alchemy/Phrasea/SearchEngine/Elastic/Indexer/BulkOperation.php b/lib/Alchemy/Phrasea/SearchEngine/Elastic/Indexer/BulkOperation.php
index 4501c82136..16e8cc7fbf 100644
--- a/lib/Alchemy/Phrasea/SearchEngine/Elastic/Indexer/BulkOperation.php
+++ b/lib/Alchemy/Phrasea/SearchEngine/Elastic/Indexer/BulkOperation.php
@@ -26,7 +26,7 @@ class BulkOperation
     private $flushLimit = 1000;
     private $throwOnError;
 
-    public function __construct(Client $client, $throwOnError = false)
+    public function __construct(Client $client, $throwOnError = true)
     {
         $this->client = $client;
         $this->throwOnError = $throwOnError;