diff --git a/accounting/config.py b/accounting/config.py
index 6f4243d74dd8d674d95873ca16277b133d7dba5b..ada2c702b09a0e57a43fd6402f68ddf7f7fad0dc 100644
--- a/accounting/config.py
+++ b/accounting/config.py
@@ -1,3 +1,7 @@
+# Part of accounting-api project:
+# https://gitorious.org/conservancy/accounting-api
+# License: AGPLv3-or-later
+
 import os
 
 LEDGER_FILE = os.environ.get('LEDGER_FILE', None)