diff --git a/etc/defaults/rc.conf b/etc/defaults/rc.conf
index f2b05df776c..5cb2caf07ac 100644
--- a/etc/defaults/rc.conf
+++ b/etc/defaults/rc.conf
@@ -247,7 +247,6 @@ ipv6_router_flags=""		# Flags to IPv6 routing daemon.
 ipv6_default_interface=""	# Default output interface for scoped addrs.
 				# Now this works only for IPv6 link local
 				# multicast addrs.
-prefixcmd_enable="YES"		# Use prefix command to assign router prefix.
 rtadvd_enable="YES"		# Set to YES to enable an IPv6 router
 				# advertisement daemon. If set to YES,
 				# this router becomes a possible candidate