diff --git a/Shorewall/Perl/Shorewall/Zones.pm b/Shorewall/Perl/Shorewall/Zones.pm
index f7dbedf39..be9905f90 100644
--- a/Shorewall/Perl/Shorewall/Zones.pm
+++ b/Shorewall/Perl/Shorewall/Zones.pm
@@ -298,6 +298,7 @@ sub initialize( $$ ) {
 				  arp_ignore  => ENUM_IF_OPTION,
 				  blacklist   => SIMPLE_IF_OPTION + IF_OPTION_HOST,
 				  bridge      => SIMPLE_IF_OPTION,
+				  destonly    => SIMPLE_IF_OPTION + IF_OPTION_HOST,
 				  detectnets  => OBSOLETE_IF_OPTION,
 				  dhcp        => SIMPLE_IF_OPTION,
 				  ignore      => NUMERIC_IF_OPTION + IF_OPTION_WILDOK,
@@ -338,6 +339,7 @@ sub initialize( $$ ) {
 	%validinterfaceoptions = (  accept_ra   => NUMERIC_IF_OPTION,
 				    blacklist   => SIMPLE_IF_OPTION + IF_OPTION_HOST,
 				    bridge      => SIMPLE_IF_OPTION,
+				    destonly    => SIMPLE_IF_OPTION + IF_OPTION_HOST,
 				    dhcp        => SIMPLE_IF_OPTION,
 				    ignore      => NUMERIC_IF_OPTION + IF_OPTION_WILDOK,
 				    local       => SIMPLE_IF_OPTION + IF_OPTION_HOST,