diff --git a/components/xtensa-debug-module/eri.c b/components/xtensa-debug-module/eri.c
index e2c7e41eb3..fc96b531fe 100644
--- a/components/xtensa-debug-module/eri.c
+++ b/components/xtensa-debug-module/eri.c
@@ -1,3 +1,16 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 #include <stdint.h>
 #include "eri.h"
 
diff --git a/components/xtensa-debug-module/trax.c b/components/xtensa-debug-module/trax.c
index d216a3df9a..5174e44776 100644
--- a/components/xtensa-debug-module/trax.c
+++ b/components/xtensa-debug-module/trax.c
@@ -1,3 +1,17 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #include <stdio.h>
 #include "soc/dport_reg.h"
 #include "sdkconfig.h"