diff --git a/lib/Gitlab/Api/MergeRequests.php b/lib/Gitlab/Api/MergeRequests.php
index ac78b0c5b..afe45ded5 100644
--- a/lib/Gitlab/Api/MergeRequests.php
+++ b/lib/Gitlab/Api/MergeRequests.php
@@ -157,12 +157,13 @@ public function merge($project_id, $mr_id, $message = null)
     /**
      * @param int   $project_id
      * @param int   $mr_id
+     * @param array $parameters
      *
      * @return mixed
      */
-    public function showNotes($project_id, $mr_id)
+    public function showNotes($project_id, $mr_id, $parameters = [])
     {
-        return $this->get($this->getProjectPath($project_id, 'merge_requests/'.$this->encodePath($mr_id).'/notes'));
+        return $this->get($this->getProjectPath($project_id, 'merge_requests/'.$this->encodePath($mr_id).'/notes'), $parameters);
     }
 
     /**