diff --git a/include/application.php b/include/application.php
index 471e5c9..eedf001 100644
--- a/include/application.php
+++ b/include/application.php
@@ -5,6 +5,7 @@
 
 require_once(BASE."include/version.php");
 require_once(BASE."include/vendor.php");
+require_once(BASE."include/category.php");
 require_once(BASE."include/url.php");
 require_once(BASE."include/util.php");
 require_once(BASE."include/mail.php");