diff --git a/programs/psa/crypto_examples.c b/programs/psa/crypto_examples.c
index f156b7b..88e34d1 100644
--- a/programs/psa/crypto_examples.c
+++ b/programs/psa/crypto_examples.c
@@ -1,3 +1,9 @@
+/*
+ *  Copyright (C) 2018-2019, ARM Limited, All Rights Reserved
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
 #include "psa/crypto.h"
 #include <string.h>
 #include <stdio.h>
diff --git a/programs/psa/key_ladder_demo.sh b/programs/psa/key_ladder_demo.sh
index 2cec945..3ffbd8b 100755
--- a/programs/psa/key_ladder_demo.sh
+++ b/programs/psa/key_ladder_demo.sh
@@ -1,4 +1,9 @@
 #!/bin/sh
+#
+# Copyright (C) 2018, Arm Limited, All Rights Reserved
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
+
 set -e -u
 
 program="${0%/*}"/key_ladder_demo
diff --git a/programs/psa/psa_constant_names.c b/programs/psa/psa_constant_names.c
index d8ffd46..e22791c 100644
--- a/programs/psa/psa_constant_names.c
+++ b/programs/psa/psa_constant_names.c
@@ -1,3 +1,9 @@
+/*
+ *  Copyright (C) 2018-2019, ARM Limited, All Rights Reserved
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
 #include <errno.h>
 #include <stdint.h>
 #include <stdio.h>
diff --git a/programs/test/udp_proxy_wrapper.sh b/programs/test/udp_proxy_wrapper.sh
index 29033d5..85f4423 100755
--- a/programs/test/udp_proxy_wrapper.sh
+++ b/programs/test/udp_proxy_wrapper.sh
@@ -1,6 +1,10 @@
 #!/bin/sh
 # -*-sh-basic-offset: 4-*-
 # Usage: udp_proxy_wrapper.sh [PROXY_PARAM...] -- [SERVER_PARAM...]
+#
+# Copyright (C) 2017, Arm Limited, All Rights Reserved
+#
+# This file is part of Mbed TLS (https://tls.mbed.org)
 
 set -u