diff --git a/django/utils/timesince.py b/django/utils/timesince.py
index a69e55498a..e1132c3ab3 100644
--- a/django/utils/timesince.py
+++ b/django/utils/timesince.py
@@ -1,4 +1,6 @@
-import datetime, math, time
+import datetime
+import time
+
 from django.utils.tzinfo import LocalTimezone
 from django.utils.translation import ungettext, ugettext