diff --git a/snappymail/v/0.0.0/setup.php b/snappymail/v/0.0.0/setup.php
index 870436d39..f829c35bb 100644
--- a/snappymail/v/0.0.0/setup.php
+++ b/snappymail/v/0.0.0/setup.php
@@ -1,6 +1,6 @@
 <?php
 
-require_once __DIR__ . 'app/libraries/snappymail/integrity.php';
+require_once __DIR__ . '/app/libraries/snappymail/integrity.php';
 
 $result = \SnappyMail\Integrity::phpVersion();
 if ($result) {