diff --git a/web/template/syzoj/problem.php b/web/template/syzoj/problem.php
index c61d6b3..5f32a73 100644
--- a/web/template/syzoj/problem.php
+++ b/web/template/syzoj/problem.php
@@ -122,10 +122,10 @@ if ($pr_flag) {
     function trans_md($str)
     {
       $s = $str;
+      $s = bbcode_to_html($s);
       if (strpos($s, "class='md") === false &&
           strpos($s, "class=\"md") === false)  // 没找到，那就加上
         $s = "<span class='md'>" . $s . "</span>";
-      $s = bbcode_to_html($s);
       return $s;
     }
     ?>