diff --git a/index.php b/index.php
index efcc8acd1..bce64d161 100644
--- a/index.php
+++ b/index.php
@@ -6,9 +6,9 @@ if (!defined('APP_VERSION'))
 	define('APP_INDEX_ROOT_PATH', __DIR__ . DIRECTORY_SEPARATOR);
 }
 
-if (file_exists('snappymail/v/'.APP_VERSION.'/include.php'))
+if (file_exists(APP_INDEX_ROOT_PATH.'snappymail/v/'.APP_VERSION.'/include.php'))
 {
-	include 'snappymail/v/'.APP_VERSION.'/include.php';
+	include APP_INDEX_ROOT_PATH.'snappymail/v/'.APP_VERSION.'/include.php';
 }
 else
 {