diff --git a/src/Jenssegers/Mongodb/Query/Builder.php b/src/Jenssegers/Mongodb/Query/Builder.php
index 62f203f7c..a6f723d25 100644
--- a/src/Jenssegers/Mongodb/Query/Builder.php
+++ b/src/Jenssegers/Mongodb/Query/Builder.php
@@ -198,7 +198,7 @@ public function hint($index)
      */
     public function find($id, $columns = [])
     {
-        return $this->where('_id', '=', $this->convertKey($id))->first($columns);
+        return $this->where($this->getKeyName(), '=', $this->convertKey($id))->first($columns);
     }
 
     /**