diff --git a/pytools/tag.py b/pytools/tag.py
index c8ef6f278bae189d03cab9f5aed0f6c5691493be..546896cb8f8d7d925923066828dcac2d178a6cc6 100644
--- a/pytools/tag.py
+++ b/pytools/tag.py
@@ -2,6 +2,32 @@ from __future__ import annotations
 from dataclasses import dataclass
 from typing import Tuple, Any, FrozenSet
 
+__copyright__ = """
+Copyright (C) 2020 Andreas Kloeckner
+Copyright (C) 2020 Matt Wala
+Copyright (C) 2020 Xiaoyu Wei
+"""
+
+__license__ = """
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+"""
+
 # {{{ dotted name