diff --git a/letsencrypt/cli.py b/letsencrypt/cli.py
index 54bdb7285..6e2f8749b 100644
--- a/letsencrypt/cli.py
+++ b/letsencrypt/cli.py
@@ -923,7 +923,7 @@ def _plugins_parsing(helpful, plugins):
     helpful.add("plugins", "--nginx", action="store_true",
                 help="Obtain and install certs using Nginx")
     helpful.add("plugins", "--standalone", action="store_true",
-                help="Obtain certs using a "standalone" webserver.")
+                help='Obtain certs using a "standalone" webserver.')
 
     # things should not be reorder past/pre this comment:
     # plugins_group should be displayed in --help before plugin