diff --git a/src/allmydata/test/test_abbreviate.py b/src/allmydata/test/test_abbreviate.py
index 7a0cbbec9..958c36742 100644
--- a/src/allmydata/test/test_abbreviate.py
+++ b/src/allmydata/test/test_abbreviate.py
@@ -1,5 +1,7 @@
 """
 Tests for allmydata.util.abbreviate.
+
+Ported to Python 3.
 """
 from __future__ import absolute_import
 from __future__ import division
diff --git a/src/allmydata/util/abbreviate.py b/src/allmydata/util/abbreviate.py
index 7361ce06d..95d547836 100644
--- a/src/allmydata/util/abbreviate.py
+++ b/src/allmydata/util/abbreviate.py
@@ -1,3 +1,8 @@
+"""
+Convert timestamps to abbreviated English text.
+
+Ported to Python 3.
+"""
 from __future__ import division
 from __future__ import absolute_import
 from __future__ import print_function