diff --git a/lib/vagrant-libvirt/action/forward_ports.rb b/lib/vagrant-libvirt/action/forward_ports.rb
index 0064ee6..7afe1aa 100644
--- a/lib/vagrant-libvirt/action/forward_ports.rb
+++ b/lib/vagrant-libvirt/action/forward_ports.rb
@@ -48,7 +48,7 @@ module VagrantPlugins
             ))
 
             if fp[:protocol] == 'udp'
-              env[:ui].warn I18n.t('vagrant_libvirt.warnings.forwarding_udp')
+              @env[:ui].warn I18n.t('vagrant_libvirt.warnings.forwarding_udp')
               next
             end