diff --git a/plugins/commands/serve/mappers/wrappers.rb b/plugins/commands/serve/mappers/wrappers.rb
index 19445bb6b..544b87051 100644
--- a/plugins/commands/serve/mappers/wrappers.rb
+++ b/plugins/commands/serve/mappers/wrappers.rb
@@ -16,7 +16,7 @@ module VagrantPlugins
         end
 
         def converter(bool)
-          Google::Protobuf::BoolValue.new(value: bool)
+          Google::Protobuf::BoolValue.new(value: bool.value)
         end
       end