diff --git a/orm/orm.go b/orm/orm.go
index e59589aa..b00c974e 100644
--- a/orm/orm.go
+++ b/orm/orm.go
@@ -548,6 +548,9 @@ func NewOrmWithDB(driverName, aliasName string, db *sql.DB) (Ormer, error) {
 
 	al.Name = aliasName
 	al.DriverName = driverName
+	al.DB = db
+	
+	detectTZ(al)
 
 	o := new(orm)
 	o.alias = al