diff --git a/components/plugins/lints.rs b/components/plugins/lints.rs
index b7eedd9fddc..34e73d2475c 100644
--- a/components/plugins/lints.rs
+++ b/components/plugins/lints.rs
@@ -1,3 +1,7 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
 use syntax::{ast, codemap, visit};
 use syntax::attr::AttrMetaMethods;
 use rustc::lint::{Context, LintPass, LintArray};
@@ -140,4 +144,4 @@ impl LintPass for UnrootedPass {
             _ => {}
         }
     }
-}
\ No newline at end of file
+}
diff --git a/components/plugins/macros.rs b/components/plugins/macros.rs
index fde756d6895..12a1953c43c 100644
--- a/components/plugins/macros.rs
+++ b/components/plugins/macros.rs
@@ -1,3 +1,7 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
 //! Exports macros for use in other Servo crates.
 
 #[macro_export]
diff --git a/components/plugins/tests.rs b/components/plugins/tests.rs
index ac8f8c3486e..fd78e2038fa 100644
--- a/components/plugins/tests.rs
+++ b/components/plugins/tests.rs
@@ -1,4 +1,8 @@
- use std::collections::hashmap::HashMap;
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+use std::collections::hashmap::HashMap;
 
 lazy_init! {
     static ref NUMBER: uint = times_two(3);
@@ -32,3 +36,4 @@ fn test_repeat() {
     assert_eq!(*NUMBER, 6);
     assert_eq!(*NUMBER, 6);
 }
+