diff --git a/Shorewall/Perl/Shorewall/Zones.pm b/Shorewall/Perl/Shorewall/Zones.pm
index c46d0aa78..d3a572501 100644
--- a/Shorewall/Perl/Shorewall/Zones.pm
+++ b/Shorewall/Perl/Shorewall/Zones.pm
@@ -745,6 +745,8 @@ sub add_group_to_zone($$$$$)
 			     hosts   => \@newnetworks,
 			     ipsec   => $type == IPSEC ? 'ipsec' : 'none' ,
 			     exclusions => \@exclusions };
+
+    $interfaces{$interface}{options}{routeback} ||= ( $type != IPSEC && $options->{routeback} );
 }
 
 #