diff --git a/src/Collection.php b/src/Collection.php
index 8e079bae1..5381ecbc3 100644
--- a/src/Collection.php
+++ b/src/Collection.php
@@ -1312,8 +1312,7 @@ private function createIndexesLegacy(Server $server, array $indexes)
         $bulk = new BulkWrite(true);
 
         foreach ($indexes as $index) {
-            // TODO: Remove this once PHPC-274 is resolved (see: PHPLIB-87)
-            $bulk->insert($index->bsonSerialize());
+            $bulk->insert($index);
         }
 
         $server->executeBulkWrite($this->dbname . '.system.indexes', $bulk);