diff --git a/letsencrypt/cli.py b/letsencrypt/cli.py
index 8e545a5de..e0aea0916 100644
--- a/letsencrypt/cli.py
+++ b/letsencrypt/cli.py
@@ -543,7 +543,7 @@ def set_configurator(previously, now):
     :param str previously: previously identified request for the installer/authenticator
     :param str requested: the request currently being processed
     """
-    if now is None:
+    if not now:
         # we're not actually setting anything
         return previously
     if previously: