diff --git a/doc/TODO b/doc/TODO
index 833911d5c..28100bcfb 100644
--- a/doc/TODO
+++ b/doc/TODO
@@ -61,3 +61,4 @@ o local-zone directive with authority service, full authority server
   is a non-goal.
 o configure option to force use of builtin ldns tarball.
 o include /etc/pki/dnssec-keys/production/*.conf with wildcard support.
+o add extended stat counter for num queries over ipv6, ipv6 usage.