diff --git a/index.php b/index.php
index f8aed80..a535047 100644
--- a/index.php
+++ b/index.php
@@ -10,6 +10,7 @@
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.min.js" integrity="sha384-fbbOQedDUMZZ5KreZpsbe1LCZPVmfTnH7ois6mU1QK+m14rQ1l2bGBq41eYeM/fS" crossorigin="anonymous"></script>
   </head>
   <body>
+    <?php define("START_TIME", microtime(true));
     <h1>PSC Monitor</h1>
     <table class="table">
       <thead>
