diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e0b742a..1594321f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.5.7 - 2015-09-28
+ * Allows the parentFolder in getFolderByDisplayName to be a folderId or a string
+
 ## 0.5.6 - 2015-09-28
  * Added simple support for creating folders
  * Added simple support for moving items
diff --git a/src/API.php b/src/API.php
index 7ad6902c..82d0731e 100644
--- a/src/API.php
+++ b/src/API.php
@@ -328,19 +328,23 @@ public function getFolderByFolderId($folderId)
 
     /**
      * @param $folderName
-     * @param string $parentFolder
+     * @param string|Type\FolderIdType $parentFolderId
      * @param array $options
      * @return bool|Type\BaseFolderType
      */
-    public function getFolderByDisplayName($folderName, $parentFolder = 'root', $options = array())
+    public function getFolderByDisplayName($folderName, $parentFolderId = 'root', $options = array())
     {
+        if (is_string($parentFolderId)) {
+            $parentFolderId = $this->getFolderByDistinguishedId($parentFolderId)->getFolderId();
+        }
+
         $request = array(
             'Traversal' => 'Shallow',
             'FolderShape' => array(
                 'BaseShape' => 'AllProperties'
             ),
             'ParentFolderIds' => array(
-                'DistinguishedFolderId' => array('Id'=>$parentFolder)
+                'FolderId' => $parentFolderId->toArray()
             )
         );