diff --git a/app/controllers/memos_controller.rb b/app/controllers/memos_controller.rb
index 68f6f6473..11d1d6e18 100644
--- a/app/controllers/memos_controller.rb
+++ b/app/controllers/memos_controller.rb
@@ -115,6 +115,8 @@ class MemosController < ApplicationController
   
   REPLIES_PER_PAGE = 20 unless const_defined?(:REPLIES_PER_PAGE)
   def show
+    #更新贴吧帖子留言对应的memo_messages的viewed字段
+    query_memo_messages = @memo.memo_messages
     pre_count = REPLIES_PER_PAGE
 
     @memo = @memo.root # 取出楼主，防止输入帖子id让回复作为主贴显示