diff --git a/webapp/models/Mall.php b/webapp/models/Mall.php
index 6309b10b..a1a8411e 100644
--- a/webapp/models/Mall.php
+++ b/webapp/models/Mall.php
@@ -94,7 +94,8 @@ class Mall extends BaseModel {
              ),
              array(
                  'status' => self::BUY_OK_STATE,
-                 'last_buyer' => $buyer
+                 'buyer' => $buyer,
+                 'buy_ok_time' => myself()->_getNowTime()
              )
             );
     }