diff --git a/application/views/cache/update.php b/application/views/cache/update.php
index 17140bf7..099e8704 100644
--- a/application/views/cache/update.php
+++ b/application/views/cache/update.php
@@ -213,7 +213,7 @@
                                 </td>
                             <?php } ?>
                             <td>
-                                <?php echo ($file_time[$it]); ?>
+                                <?php echo (isset($file_time[$it]) ? $file_time[$it] : 'bad file'); ?>
                             </td>
                             <td class="msg_wait">无操作</td>
                         </tr>