diff --git a/src/Search.php b/src/Search.php
index e67cf4a8dbf934349bae6b3cc7aa5c84e985b1c7..6529ce44296c319d920c8292bb4ac5f2d3fe5a88 100644
--- a/src/Search.php
+++ b/src/Search.php
@@ -204,7 +204,7 @@ class Search
     {
         $this
             ->getEndpoint(PostFilterEndpoint::NAME)
-            ->add($filter, $boolType, $key);
+            ->addToBool($filter, $boolType, $key);
 
         return $this;
     }