diff --git a/web/template/syzoj/category.php b/web/template/syzoj/category.php
index db47bf6..4f20fd4 100644
--- a/web/template/syzoj/category.php
+++ b/web/template/syzoj/category.php
@@ -1,5 +1,6 @@
 <?php $show_title="$MSG_SOURCE - $OJ_NAME"; ?>
 <?php include("template/$OJ_TEMPLATE/header.php");?>
+<?php require_once('./include/const.inc.php');?>
 <div class="padding">
     <div style="margin-top: 0px; margin-bottom: 14px; padding-bottom: 0px; " >
         <p class="transition visible">