diff --git a/net/netfilter/nf_conntrack_timeout.c b/net/netfilter/nf_conntrack_timeout.c
index edac8ea4436d..13d0f4a92647 100644
--- a/net/netfilter/nf_conntrack_timeout.c
+++ b/net/netfilter/nf_conntrack_timeout.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
  * (C) 2012 by Vyatta Inc. <http://www.vyatta.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation (or any later at your option).
  */
 
 #include <linux/types.h>
diff --git a/net/netfilter/nf_conntrack_timestamp.c b/net/netfilter/nf_conntrack_timestamp.c
index 705b912bd91f..f656d393fa92 100644
--- a/net/netfilter/nf_conntrack_timestamp.c
+++ b/net/netfilter/nf_conntrack_timestamp.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * (C) 2010 Pablo Neira Ayuso <pablo@netfilter.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation (or any later at your option).
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c
index 02c877432d71..2481470dec36 100644
--- a/net/netfilter/nfnetlink_acct.c
+++ b/net/netfilter/nfnetlink_acct.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * (C) 2011 Pablo Neira Ayuso <pablo@netfilter.org>
  * (C) 2011 Intra2net AG <http://www.intra2net.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation (or any later at your option).
  */
 #include <linux/init.h>
 #include <linux/module.h>
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index 17eb473a626b..7525063c25f5 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * (C) 2012 Pablo Neira Ayuso <pablo@netfilter.org>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation (or any later at your option).
- *
  * This software has been sponsored by Vyatta Inc. <http://www.vyatta.com>
  */
 #include <linux/init.h>
diff --git a/net/netfilter/nfnetlink_cttimeout.c b/net/netfilter/nfnetlink_cttimeout.c
index 427b411c5739..da915c224a82 100644
--- a/net/netfilter/nfnetlink_cttimeout.c
+++ b/net/netfilter/nfnetlink_cttimeout.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
  * (C) 2012 by Vyatta Inc. <http://www.vyatta.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation (or any later at your option).
  */
 #include <linux/init.h>
 #include <linux/module.h>