diff --git a/configs/releng/packages.both b/configs/releng/packages.both
index e058b4a..becb41f 100644
--- a/configs/releng/packages.both
+++ b/configs/releng/packages.both
@@ -29,6 +29,7 @@ linux-atm
 lsscsi
 mc
 mtools
+ndisc6
 nfs-utils
 nilfs-utils
 nmap