diff --git a/logdb.go b/logdb.go
index 2d72d3d..6cc29eb 100644
--- a/logdb.go
+++ b/logdb.go
@@ -110,7 +110,7 @@ func (logdb *LogDB) Select(query string, args ...interface{}) *sql.Rows {
 
 // ADError 广告错误后更新
 func (logdb *LogDB) ADError(uid, error_msg string) {
-	_, err := logdb.driver.Exec("update "+logdb.DB+" set status = status + 1000, error_msg=?  where uid =?;", error_msg, uid)
+	_, err := logdb.driver.Exec("update ? set status = status + 1000, error_msg=?  where uid =?;", logdb.DB, error_msg, uid)
 	if err != nil {
 		log.Println(err)
 	}