diff --git a/letsencrypt/storage.py b/letsencrypt/storage.py
index f457fe13e..01ff0677f 100644
--- a/letsencrypt/storage.py
+++ b/letsencrypt/storage.py
@@ -567,8 +567,8 @@ class RenewableCert(object):  # pylint: disable=too-many-instance-attributes
                 "cert", self.latest_common_version()))
             now = pytz.UTC.fromutc(datetime.datetime.utcnow())
             if expiry < add_time_interval(now, interval):
-                logger.debug("Should renew, certificate "
-                             "has been expired since %s.",
+                logger.debug("Should renew, less than %r days before certificate "
+                             "expiry %s.", interval,
                              expiry.strftime("%Y-%m-%d %H:%M:%S %Z"))
                 return True
         return False