diff --git a/webapp/controller/TankController.class.php b/webapp/controller/TankController.class.php
index d4d721d..bd37f78 100644
--- a/webapp/controller/TankController.class.php
+++ b/webapp/controller/TankController.class.php
@@ -312,6 +312,10 @@ class TankController{
                                                  ':accountid' => $account_id,
                                                  ':tank_id' => $exchangetank_id,
                                             ));
+        if (!$row_exchange) {
+            phpcommon\sendError(ERR_USER_BASE + 2, '没有这个皮肤');
+            return;
+        }
         $exchange_ret = $conn->execScript('UPDATE tank SET tank_status=0, modify_time=:modify_time ' .
                                           ' WHERE accountid = :account_id AND tank_id = :tank_id;',
                                           array(