diff --git a/accounting/__init__.py b/accounting/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..29fb54661672321184fe80fc6fbc30d553289660 100644
--- a/accounting/__init__.py
+++ b/accounting/__init__.py
@@ -0,0 +1,4 @@
+# Part of accounting-api project:
+# https://gitorious.org/conservancy/accounting-api
+# License: AGPLv3-or-later
+