diff --git a/ReactCommon/hermes/inspector/detail/CallbackOStream.cpp b/ReactCommon/hermes/inspector/detail/CallbackOStream.cpp
index 9057f527f1d..ed0c5b7cffa 100644
--- a/ReactCommon/hermes/inspector/detail/CallbackOStream.cpp
+++ b/ReactCommon/hermes/inspector/detail/CallbackOStream.cpp
@@ -1,4 +1,9 @@
-// Copyright 2004-present Facebook. All Rights Reserved.
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
 
 #include "CallbackOStream.h"
 
diff --git a/ReactCommon/hermes/inspector/detail/CallbackOStream.h b/ReactCommon/hermes/inspector/detail/CallbackOStream.h
index 255f687450d..5085743c862 100644
--- a/ReactCommon/hermes/inspector/detail/CallbackOStream.h
+++ b/ReactCommon/hermes/inspector/detail/CallbackOStream.h
@@ -1,4 +1,9 @@
-// Copyright 2004-present Facebook. All Rights Reserved.
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
 
 #pragma once
 
diff --git a/ReactCommon/hermes/inspector/detail/tests/CallbackOStreamTests.cpp b/ReactCommon/hermes/inspector/detail/tests/CallbackOStreamTests.cpp
index e93be0f3571..03f0aadc919 100644
--- a/ReactCommon/hermes/inspector/detail/tests/CallbackOStreamTests.cpp
+++ b/ReactCommon/hermes/inspector/detail/tests/CallbackOStreamTests.cpp
@@ -1,4 +1,9 @@
-// Copyright 2004-present Facebook. All Rights Reserved.
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
 
 #include <hermes/inspector/detail/CallbackOStream.h>