diff --git a/lib/vagrant/vagrantfile.rb b/lib/vagrant/vagrantfile.rb
index da85d2360..b6b2c15ec 100644
--- a/lib/vagrant/vagrantfile.rb
+++ b/lib/vagrant/vagrantfile.rb
@@ -192,7 +192,7 @@ module Vagrant
       return {
         box: box,
         provider_cls: provider_cls,
-        provider_options: provider_options,
+        provider_options: provider_options.dup,
         config: config,
         config_warnings: config_warnings,
         config_errors: config_errors,