diff --git a/sheep/api/trade/order.js b/sheep/api/trade/order.js
index 2e571b20..4d571252 100644
--- a/sheep/api/trade/order.js
+++ b/sheep/api/trade/order.js
@@ -13,7 +13,7 @@ const OrderApi = {
     if (!(data.addressId > 0)) {
       delete data2.addressId;
     }
-    if (!(data.combinationActivityId) > 0) {
+    if (!(data.combinationActivityId > 0)) {
       delete data2.combinationActivityId;
     }
     if (!(data.combinationHeadId > 0)) {