diff --git a/fizz/BUILD_MODE.bzl b/fizz/BUILD_MODE.bzl
index fe0e6d39f8d..8c484c084b6 100644
--- a/fizz/BUILD_MODE.bzl
+++ b/fizz/BUILD_MODE.bzl
@@ -1,4 +1,9 @@
-# (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
 """ build mode definitions for fizz """
 
 load("@fbcode//:BUILD_MODE.bzl", get_parent_modes = "get_empty_modes")
diff --git a/fizz/defs.bzl b/fizz/defs.bzl
index 89d72658de5..b992c708de2 100644
--- a/fizz/defs.bzl
+++ b/fizz/defs.bzl
@@ -1,4 +1,8 @@
-# (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
 load("@fbsource//tools/build_defs:buckconfig.bzl", "read_bool")
 load("@fbsource//tools/build_defs:fb_xplat_cxx_binary.bzl", "fb_xplat_cxx_binary")
 load("@fbsource//tools/build_defs:fb_xplat_cxx_library.bzl", "fb_xplat_cxx_library")
diff --git a/fizz/extensions/delegatedcred/Serialization.cpp b/fizz/extensions/delegatedcred/Serialization.cpp
index 03336115e30..dab0c3807dd 100644
--- a/fizz/extensions/delegatedcred/Serialization.cpp
+++ b/fizz/extensions/delegatedcred/Serialization.cpp
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
 #include <fizz/extensions/delegatedcred/DelegatedCredentialUtils.h>
 #include <fizz/extensions/delegatedcred/Serialization.h>
 #include <folly/Format.h>
diff --git a/fizz/extensions/delegatedcred/Serialization.h b/fizz/extensions/delegatedcred/Serialization.h
index 1c78fb4f05a..08ffa306bce 100644
--- a/fizz/extensions/delegatedcred/Serialization.h
+++ b/fizz/extensions/delegatedcred/Serialization.h
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
 #include <fizz/extensions/delegatedcred/SelfDelegatedCredential.h>
 #include <fizz/extensions/delegatedcred/Types.h>
 
diff --git a/fizz/fizzy_defs.bzl b/fizz/fizzy_defs.bzl
index 954f19ef25d..beefe68f689 100644
--- a/fizz/fizzy_defs.bzl
+++ b/fizz/fizzy_defs.bzl
@@ -1,4 +1,8 @@
-# (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
 load("@fbsource//tools/build_defs:fb_xplat_cxx_library.bzl", "fb_xplat_cxx_library")
 load(":defs.bzl", "CXXFLAGS")
 
diff --git a/fizz/protocol/Factory.cpp b/fizz/protocol/Factory.cpp
index 53f016e2ca5..067aa5ff4b6 100644
--- a/fizz/protocol/Factory.cpp
+++ b/fizz/protocol/Factory.cpp
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
 #include <fizz/protocol/Factory.h>
 
 namespace fizz {
diff --git a/oss_buck_build_and_test.sh b/oss_buck_build_and_test.sh
index a646f6f31fa..9e34d6cc036 100644
--- a/oss_buck_build_and_test.sh
+++ b/oss_buck_build_and_test.sh
@@ -1,5 +1,9 @@
 #!/bin/bash
-# (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
 
 
 if [ "$GITHUB_ACTIONS" == "true" ]; then