diff --git a/src/Search.php b/src/Search.php
index 89726af4..da8372b0 100644
--- a/src/Search.php
+++ b/src/Search.php
@@ -752,6 +752,7 @@ public function addUriParam($name, $value)
             'typed_keys',
             'pre_filter_shard_size',
             'ignore_unavailable',
+            'rest_total_hits_as_int',
         ])) {
             $this->uriParams[$name] = $value;
         } else {