diff --git a/lib/veewee/provider/virtualbox/box/helper/create.rb b/lib/veewee/provider/virtualbox/box/helper/create.rb
index <HASH>..<HASH> 100644
--- a/lib/veewee/provider/virtualbox/box/helper/create.rb
+++ b/lib/veewee/provider/virtualbox/box/helper/create.rb
@@ -24,7 +24,7 @@ module Veewee
 
         def add_ssh_nat_mapping
 
-          unless definition.nil? || definition.force_ssh_port
+          unless definition.nil? || definition.no_nat
             #Map SSH Ports
             command="#{@vboxcmd} modifyvm \"#{name}\" --natpf#{self.natinterface} \"guestssh,tcp,,#{definition.ssh_host_port},,#{definition.ssh_guest_port}\""
             shell_exec("#{command}")
created a new :no_nat configuration stanza (boolean) separated from force_ssh_port: it is now possible to deactivate one or the other separately