diff --git a/accounting/decorators.py b/accounting/decorators.py
index 6e5c1de6e8bc1d9971931872d122afb8a01b963d..c7f15955efe7eeb788b64715bf69794d5b472325 100644
--- a/accounting/decorators.py
+++ b/accounting/decorators.py
@@ -1,3 +1,7 @@
+# Part of accounting-api project:
+# https://gitorious.org/conservancy/accounting-api
+# License: AGPLv3-or-later
+
 from functools import wraps
 
 from flask import jsonify