diff --git a/business/model/dao/dao_order.go b/business/model/dao/dao_order.go
index b526abdac..0dfbd0517 100644
--- a/business/model/dao/dao_order.go
+++ b/business/model/dao/dao_order.go
@@ -191,7 +191,7 @@ type GetPayStatisticsResult struct {
 }
 
 func GetPayStatistics(db *DaoDB, userID string, pop int, cityCodes []int, mobile string, fromTime, toTime time.Time, orderTypes []int) (getPayStatisticsResult *GetPayStatisticsResult, err error) {
-	sqlParams := []interface{}{}
+	var sqlParams []interface{}
 	getWhereSql := func(sqlP []interface{}) (sql string) {
 		if len(orderTypes) > 0 {
 			sql += ` AND b.order_type IN ` + GenQuestionMarks(len(orderTypes)) + `)`