diff --git a/B3QingDaoWanFu/Rpc/TrustPayRpc.cs b/B3QingDaoWanFu/Rpc/TrustPayRpc.cs
index a5a6fbf..7c9e173 100644
--- a/B3QingDaoWanFu/Rpc/TrustPayRpc.cs
+++ b/B3QingDaoWanFu/Rpc/TrustPayRpc.cs
@@ -29,7 +29,7 @@ namespace BWP.B3QingDaoWanFu.Rpc {
       query.Columns.Add(DQSelectColumn.Field("IsAccountCustomer"));
       query.Where.Conditions.Add(DQCondition.EQ("ID",accountCustomerID));
      var isAccountCustomer= query.EExecuteScalar<bool?>();
-      if (isAccountCustomer ?? false)
+      if (!(isAccountCustomer ?? false))
       {
         throw new ApplicationException("该客户不是结账客户，请修改个性设置中的往来客户");
       }