diff --git a/swh/__init__.py b/swh/__init__.py
index f14e196..397a357 100644
--- a/swh/__init__.py
+++ b/swh/__init__.py
@@ -1,4 +1,9 @@
+# Copyright (C) 2016-2020  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from pkgutil import extend_path
 from typing import Iterable
 
-__path__ = extend_path(__path__, __name__)  # type: Iterable[str]
+__path__: Iterable[str] = extend_path(__path__, __name__)
diff --git a/swh/loader/__init__.py b/swh/loader/__init__.py
index f14e196..397a357 100644
--- a/swh/loader/__init__.py
+++ b/swh/loader/__init__.py
@@ -1,4 +1,9 @@
+# Copyright (C) 2016-2020  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
 from pkgutil import extend_path
 from typing import Iterable
 
-__path__ = extend_path(__path__, __name__)  # type: Iterable[str]
+__path__: Iterable[str] = extend_path(__path__, __name__)