2 files changed, 2 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/core_ext/array/conversions.rb b/activesupport/lib/active_support/core_ext/array/conversions.rb
index e0e5a36cfd..b516f58bff 100644
--- a/activesupport/lib/active_support/core_ext/array/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/array/conversions.rb
@@ -38,7 +38,7 @@ module ActiveSupport #:nodoc:
           children = options.delete(:children)
 
           options[:builder].instruct! unless options.delete(:skip_instruct)
-          options[:builder].tag!(root) { each { |e| e.to_xml(options.merge({ :skip_instruct => true, :root => children })) } }
+          options[:builder].tag!(root.to_s.dasherize) { each { |e| e.to_xml(options.merge({ :skip_instruct => true, :root => children })) } }
         end
       end
     end
diff --git a/activesupport/lib/active_support/core_ext/hash/conversions.rb b/activesupport/lib/active_support/core_ext/hash/conversions.rb
index 4cd171a6d1..31779e6b20 100644
--- a/activesupport/lib/active_support/core_ext/hash/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/hash/conversions.rb
@@ -20,7 +20,7 @@ module ActiveSupport #:nodoc:
           options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]), :root => "hash" })
           options[:builder].instruct! unless options.delete(:skip_instruct)
 
-          options[:builder].__send__(options[:root]) do
+          options[:builder].__send__(options[:root].to_s.dasherize) do
             for key in keys
               value = self[key]