diff --git a/plugins/commands/serve/mappers/known_types.rb b/plugins/commands/serve/mappers/known_types.rb
index f28cffa2b..de09692fb 100644
--- a/plugins/commands/serve/mappers/known_types.rb
+++ b/plugins/commands/serve/mappers/known_types.rb
@@ -169,7 +169,7 @@ module VagrantPlugins
 
         def converter(proto, mapper)
           begin
-            Vagrant::Util::HashWithIndifferentAccess.new.tap do |result|
+            Hash.new.tap do |result|
               proto.fields.each do |k, v|
                 r = mapper.map(v)
                 # unwrap any wrapper classes here before assigning