diff --git a/certbot-apache/certbot_apache/_internal/http_01.py b/certbot-apache/certbot_apache/_internal/http_01.py
index ad62a77bb..6c822cc38 100644
--- a/certbot-apache/certbot_apache/_internal/http_01.py
+++ b/certbot-apache/certbot_apache/_internal/http_01.py
@@ -1,5 +1,6 @@
 """A class that performs HTTP-01 challenges for Apache"""
 import logging
+import errno
 
 from acme.magic_typing import List  # pylint: disable=unused-import, no-name-in-module
 from acme.magic_typing import Set  # pylint: disable=unused-import, no-name-in-module