diff --git a/lib/vagrant/action/vm/network.rb b/lib/vagrant/action/vm/network.rb
index 5e4a7a178..e79da8c7e 100644
--- a/lib/vagrant/action/vm/network.rb
+++ b/lib/vagrant/action/vm/network.rb
@@ -308,6 +308,7 @@ module Vagrant
 
         def bridged_config(args)
           options = args[0] || {}
+          options = {} if !options.is_a?(Hash)
 
           return {
             :adapter => nil,