diff --git a/libexec/rc/rc.conf b/libexec/rc/rc.conf
index 7c118dfb48f0..1c8b0b9afbb7 100644
--- a/libexec/rc/rc.conf
+++ b/libexec/rc/rc.conf
@@ -178,6 +178,9 @@ firewall_nologports="135-139,445 1026,1027 1433,1434" # List of TCP/UDP ports
 firewall_nat_enable="NO"	# Enable kernel NAT (if firewall_enable == YES)
 firewall_nat_interface=""	# Public interface or IPaddress to use
 firewall_nat_flags=""		# Additional configuration parameters
+firewall_nat64_enable="NO"	# Enable kernel NAT64 module.
+firewall_nptv6_enable="NO"	# Enable kernel NPTv6 module.
+firewall_pmod_enable="NO"	# Enable kernel protocols modification module.
 dummynet_enable="NO"		# Load the dummynet(4) module
 ipfw_netflow_enable="NO"	# Enable netflow logging via ng_netflow
 ip_portrange_first="NO"		# Set first dynamically allocated port