diff --git a/src/Jenssegers/Mongodb/Schema/Blueprint.php b/src/Jenssegers/Mongodb/Schema/Blueprint.php
index 0d0e1cb8fe08a4def663ab75764db36e1fb96612..f49aae1f3203e02a534d2195f4dea6969892fb2f 100644
--- a/src/Jenssegers/Mongodb/Schema/Blueprint.php
+++ b/src/Jenssegers/Mongodb/Schema/Blueprint.php
@@ -236,7 +236,7 @@ class Blueprint extends \Illuminate\Database\Schema\Blueprint
         $options['sparse'] = true;
         $options['unique'] = true;
 
-        $this->index($columns, $options);
+        $this->index($columns, null, null, $options);
 
         return $this;
     }