diff --git a/plugins/guests/debian/cap/configure_networks.rb b/plugins/guests/debian/cap/configure_networks.rb
index 16e50158e..0cb3d006f 100644
--- a/plugins/guests/debian/cap/configure_networks.rb
+++ b/plugins/guests/debian/cap/configure_networks.rb
@@ -7,7 +7,7 @@ module VagrantPlugins
   module GuestDebian
     module Cap
       class ConfigureNetworks
-        include Vagrant::Util
+        extend Vagrant::Util
 
         def self.configure_networks(machine, networks)
           machine.communicate.tap do |comm|