diff --git a/certbot-nginx/certbot_nginx/http_01.py b/certbot-nginx/certbot_nginx/http_01.py
index 1f1e37891..c64b43340 100644
--- a/certbot-nginx/certbot_nginx/http_01.py
+++ b/certbot-nginx/certbot_nginx/http_01.py
@@ -5,6 +5,7 @@ import os
 
 from acme import challenges
 
+from certbot import errors
 from certbot.plugins import common