diff --git a/app/views/admin/announcements/_index.html.erb b/app/views/admin/announcements/_index.html.erb
index 57af791..cf1f405 100644
--- a/app/views/admin/announcements/_index.html.erb
+++ b/app/views/admin/announcements/_index.html.erb
@@ -40,7 +40,7 @@
         </td>
         <td><%= format_value b.postdate %></td>
         <td class="<%= b.expired? ? "expired" : "" %>"><%= format_value b.deadline %></td>
-        <td><%= b.update_user.user_name %></td>
+        <td><%= b.update_user.user_name rescue ""%></td>
       </tr>
       <tr class="footable-row-detail">
         <td class="footable-cell-detail" colspan="6">