diff --git a/airtime_mvc/application/configs/constants.php b/airtime_mvc/application/configs/constants.php
index ceedf7f3f..0f5e4a07c 100644
--- a/airtime_mvc/application/configs/constants.php
+++ b/airtime_mvc/application/configs/constants.php
@@ -4,6 +4,9 @@ define('AIRTIME_VERSION', '1.9.0-beta2');
 define('AIRTIME_COPYRIGHT_DATE', '2010-2011');
 define('AIRTIME_REST_VERSION', '1.1');
 
+// this constant is still used in somewhere
+define('UI_MDATA_KEY_TITLE', 'track_title');
+
 // Metadata Keys for files
 define('MDATA_KEY_FILEPATH', 'filepath');
 define('MDATA_KEY_MD5', 'md5');
diff --git a/airtime_mvc/application/models/StoredFile.php b/airtime_mvc/application/models/StoredFile.php
index 67f658a51..807a3f584 100644
--- a/airtime_mvc/application/models/StoredFile.php
+++ b/airtime_mvc/application/models/StoredFile.php
@@ -805,7 +805,7 @@ class StoredFile {
 				die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": ' . $duplicate->getMessage() .'}}');
 			}
             if (file_exists($duplicate->getFilePath())) {
-			    $duplicateName = $duplicate->getMetadataValue(UI_MDATA_KEY_TITLE);
+			    $duplicateName = $duplicate->getMetadataValue("UI_MDATA_KEY_TITLE");
 			    die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "An identical audioclip named ' . $duplicateName . ' already exists in the storage server."}}');
             }
 		}