diff --git a/src/Elasticsearch/Endpoints/Msearch.php b/src/Elasticsearch/Endpoints/Msearch.php
index 93be90c6e..9849a98be 100644
--- a/src/Elasticsearch/Endpoints/Msearch.php
+++ b/src/Elasticsearch/Endpoints/Msearch.php
@@ -78,7 +78,8 @@ public function getParamWhitelist()
         return array(
             'search_type',
             'typed_keys',
-            'max_concurrent_shard_requests'
+            'max_concurrent_shard_requests',
+            'max_concurrent_searches'
         );
     }