diff --git a/components/speedreader/rust/lib/src/readability/src/lib.rs b/components/speedreader/rust/lib/src/readability/src/lib.rs
index ef9c28682bff..1360b44f31d6 100644
--- a/components/speedreader/rust/lib/src/readability/src/lib.rs
+++ b/components/speedreader/rust/lib/src/readability/src/lib.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2021 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
 #[macro_use]
 extern crate html5ever;
 extern crate kuchikiki;
diff --git a/components/speedreader/rust/lib/src/readability/src/nlp.rs b/components/speedreader/rust/lib/src/readability/src/nlp.rs
index fed68fe6bec4..596fc44788a0 100644
--- a/components/speedreader/rust/lib/src/readability/src/nlp.rs
+++ b/components/speedreader/rust/lib/src/readability/src/nlp.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2021 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
 use regex::{Regex, RegexSet};
 use std::cmp::max;
 use std::collections::HashSet;
diff --git a/components/speedreader/rust/lib/src/readability/src/scorer.rs b/components/speedreader/rust/lib/src/readability/src/scorer.rs
index f78d3600a87c..3e2cd3fa732e 100644
--- a/components/speedreader/rust/lib/src/readability/src/scorer.rs
+++ b/components/speedreader/rust/lib/src/readability/src/scorer.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2021 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
 use crate::{dom, util};
 use html5ever::tendril::StrTendril;
 use html5ever::tree_builder::TreeSink;
diff --git a/components/speedreader/rust/lib/src/readability/src/statistics.rs b/components/speedreader/rust/lib/src/readability/src/statistics.rs
index b63fed2ca2f1..dc11f89a6f72 100644
--- a/components/speedreader/rust/lib/src/readability/src/statistics.rs
+++ b/components/speedreader/rust/lib/src/readability/src/statistics.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2021 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
 use crate::{dom, util};
 use kuchikiki::iter::NodeIterator;
 use kuchikiki::NodeRef as Handle;
diff --git a/components/speedreader/rust/lib/src/speedreader_readability.rs b/components/speedreader/rust/lib/src/speedreader_readability.rs
index 646118547ad3..11320d56340c 100644
--- a/components/speedreader/rust/lib/src/speedreader_readability.rs
+++ b/components/speedreader/rust/lib/src/speedreader_readability.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2021 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
 use html5ever::driver::{ParseOpts, Parser};
 use html5ever::tendril::{StrTendril, TendrilSink};
 use kuchikiki::Sink;
diff --git a/components/speedreader/rust/lib/tests/legacy.rs b/components/speedreader/rust/lib/tests/legacy.rs
index 3eeba8fe6437..b12625b45cd0 100644
--- a/components/speedreader/rust/lib/tests/legacy.rs
+++ b/components/speedreader/rust/lib/tests/legacy.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2021 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
 #![allow(dead_code)]
 extern crate distance;
 extern crate html5ever;
diff --git a/components/speedreader/rust/lib/tests/lib.rs b/components/speedreader/rust/lib/tests/lib.rs
index 929474a977d5..ace0e0da07ac 100644
--- a/components/speedreader/rust/lib/tests/lib.rs
+++ b/components/speedreader/rust/lib/tests/lib.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2021 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
 #![allow(dead_code)]
 extern crate distance;
 extern crate html5ever;