diff --git a/src/Elasticsearch/Endpoints/Indices/Stats.php b/src/Elasticsearch/Endpoints/Indices/Stats.php
index 899afc6df..bbdc1d2fc 100644
--- a/src/Elasticsearch/Endpoints/Indices/Stats.php
+++ b/src/Elasticsearch/Endpoints/Indices/Stats.php
@@ -71,7 +71,8 @@ public function getParamWhitelist()
             'human',
             'level',
             'types',
-            'metric'
+            'metric',
+            'include_segment_file_sizes'
         );
     }