diff --git a/earwigbot/commands/cidr.py b/earwigbot/commands/cidr.py
index cd9d72b..a4e285e 100644
--- a/earwigbot/commands/cidr.py
+++ b/earwigbot/commands/cidr.py
@@ -27,7 +27,7 @@ from socket import AF_INET, AF_INET6
 
 from earwigbot.commands import Command
 
-_IP = namedtuple("_IP", ["family", "ip"])
+_IP = namedtuple("_IP", ["family", "ip", "size"])
 _Range = namedtuple("_Range", [
     "family", "range", "low", "high", "size", "addresses"])