diff --git a/getUploadSize.php b/getUploadSize.php
index 19fb0d5..d85a592 100644
--- a/getUploadSize.php
+++ b/getUploadSize.php
@@ -1,4 +1,5 @@
 <?php
+session_start();
 require_once 'config.php';
 
 function getDirectorySize($dir) {