protocol = <%= scope.lookupvar('protocol') %>
<%- if scope.lookupvar('flags') != '' -%>
flags = <%= scope.lookupvar('flags') %>
-<%- elsif scope.lookupvar('bind') =~ /:/ -%>
+<%- elsif scope.lookupvar('bind') =~ /:/ or scope.lookupvar('bind') == "" -%>
flags = IPv6
<%- end -%>
wait = <%= scope.lookupvar('wait') %>