diff --git a/trunk/web/admin/problem_edit.php b/trunk/web/admin/problem_edit.php
index a8025e53335..0b0f91947ec 100644
--- a/trunk/web/admin/problem_edit.php
+++ b/trunk/web/admin/problem_edit.php
@@ -24,7 +24,7 @@
     <?php
     if (isset($_GET['id'])) {
       ;//require_once("../include/check_get_key.php");
-        $pid=intval($_GET['pid']);
+        $pid=intval($_GET['id']);
         if(! (isset($_SESSION[$OJ_NAME.'_'.'administrator']) || isset($_SESSION[$OJ_NAME.'_'."p".$pid])) ){
                 echo "No Privilege.";
                 exit(0);