diff --git a/app/views/admin/latest_login_users.html.erb b/app/views/admin/latest_login_users.html.erb
index c438dcebd..28ef8091e 100644
--- a/app/views/admin/latest_login_users.html.erb
+++ b/app/views/admin/latest_login_users.html.erb
@@ -70,18 +70,20 @@
                 <%=link_to(user.login, user_path(user)) %>
               </td>
               <td align="center">
-                <% case user.user_extensions.identity %>
-                <% when 0 %>
-                <%='老师' %>
-                <% when 1 %>
-                <%='学生' %>
-                <% when 2 %>
-                <%='企业' %>
-                <% when 3 %>
-                <%='开发者' %>
-                <% else %>
-                <%='未知身份' %>
-                <% end %>
+                <%if user.user_extensions%>
+                    <% case user.user_extensions.identity %>
+                    <% when 0 %>
+                        <%='老师' %>
+                    <% when 1 %>
+                        <%='学生' %>
+                    <% when 2 %>
+                        <%='企业' %>
+                    <% when 3 %>
+                        <%='开发者' %>
+                    <% else %>
+                        <%='未知身份' %>
+                    <% end %>
+                <% end%>
               </td>
             </tr>
         <% end %>