diff --git a/web/reinfo.php b/web/reinfo.php
index a4e493a..1056608 100644
--- a/web/reinfo.php
+++ b/web/reinfo.php
@@ -86,6 +86,8 @@ if($ok){
   else if(strpos($row['error'],"PASS")!==false) $view_reinfo =  "error3";
   else if($OJ_SHOW_DIFF && $row && ($ok||$isRE) && ($OJ_TEST_RUN||is_valid($row['error'])||$ok)){ 
     $view_reinfo = str_replace("\n\r","\n",$row['error']);
+    $view_reinfo = str_replace(">",">",$view_reinfo);
+    $view_reinfo = str_replace("&lt;","<",$view_reinfo);
     // $view_reinfo = htmlentities($view_reinfo,ENT_QUOTES,"UTF-8");
     $view_reinfo = "```\n" . $view_reinfo. "```\n";