diff --git a/user_space/sdr-ad-hoc-join.sh b/user_space/sdr-ad-hoc-join.sh
index 557a989..2c3d088 100755
--- a/user_space/sdr-ad-hoc-join.sh
+++ b/user_space/sdr-ad-hoc-join.sh
@@ -1,9 +1,9 @@
 #!/bin/bash
 
-# SPDX-FileCopyrightText: 2019 Jiao Xianjun <putaoshu@msn.com>
+# Author: Xianjun Jiao
+# SPDX-FileCopyrightText: 2019 UGent
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-
 if [ $# -ne 4 ]
   then
     echo "Please input NIC_name ch_number ip_addr cell as input parameter!"