diff --git a/src/control/ctl_symbols_list.c b/src/control/ctl_symbols_list.c
index 40b986f2..ea17749d 100644
--- a/src/control/ctl_symbols_list.c
+++ b/src/control/ctl_symbols_list.c
@@ -1,3 +1,23 @@
+/*
+ *  ALSA lib C file ctl_symbols_list.c
+ *  Copyright (c) 2022 Huawei Device Co., Ltd.
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as
+ *   published by the Free Software Foundation; either version 2.1 of
+ *   the License, or (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public
+ *   License along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
 &_snd_module_control_remap,
 &_snd_module_control_shm,
 &_snd_module_control_ext,