diff --git a/certbot-postfix/certbot_postfix/installer.py b/certbot-postfix/certbot_postfix/installer.py
index 52244ce92..0a109e1de 100644
--- a/certbot-postfix/certbot_postfix/installer.py
+++ b/certbot-postfix/certbot_postfix/installer.py
@@ -1,8 +1,8 @@
 import logging
-import sys
+import os
 import string
 import subprocess
-import os, os.path
+import sys
 
 import zope.interface