diff --git a/lib/winrm/psrp/message_data/base.rb b/lib/winrm/psrp/message_data/base.rb
index 9d382de4..5378fc5f 100644
--- a/lib/winrm/psrp/message_data/base.rb
+++ b/lib/winrm/psrp/message_data/base.rb
@@ -35,7 +35,7 @@ def clixml
             parser = Nori.new(
               parser: :rexml,
               advanced_typecasting: false,
-              convert_tags_to: ->(tag) { Nori::StringUtils.snakecase(tag).to_sym },
+              convert_tags_to: ->(tag) { tag.snakecase.to_sym },
               strip_namespaces: true
             )
             parser.parse(raw)[:obj][:ms]