diff --git a/js.php b/js.php
index 2b1c2ae..e244ae8 100644
--- a/js.php
+++ b/js.php
@@ -66,7 +66,7 @@ if($last_modified === $requested_time)
 header("Content-Type: application/x-javascript; charset=utf8");
 header("Cache-control: public, max-age=691200, must-revalidate");
 header("Last-Modified: ".gmdate('D, d M Y H:i:s', $last_modified)." GMT");
-header("Expires: ".gmdate('D, d M Y H:i:s', (filemtime($base_path.'js.tsp') + 691200))." GMT");
+header("Expires: ".gmdate('D, d M Y H:i:s', (filemtime($base_path.'js.php') + 691200))." GMT");
 
 echo $js;