diff --git a/htdocs/index.php b/htdocs/index.php
index f3f9d7efcc3..e7a30adfc4b 100644
--- a/htdocs/index.php
+++ b/htdocs/index.php
@@ -17,6 +17,7 @@
  * @link     https://www.github.com/aces/Loris/
  */
 require_once __DIR__ . '/../vendor/autoload.php';
+require_once __DIR__ . "/../php/libraries/Profiler.php";
 
 // We don't want PHP to automatically add cache control headers unless
 // we explicitly generate them in the request response. (This needs