diff --git a/piwik.php b/piwik.php
index 79772677fbf..8f9a68d6372 100644
--- a/piwik.php
+++ b/piwik.php
@@ -70,6 +70,7 @@
 require_once PIWIK_INCLUDE_PATH . '/core/CacheFile.php';
 require_once PIWIK_INCLUDE_PATH . '/core/Filesystem.php';
 require_once PIWIK_INCLUDE_PATH . '/core/Cookie.php';
+require_once PIWIK_INCLUDE_PATH . '/core/Loader.php';
 
 session_cache_limiter('nocache');
 @date_default_timezone_set('UTC');