diff --git a/lib/redmine/wiki_formatting/macros.rb b/lib/redmine/wiki_formatting/macros.rb
index de23eab..6203fd0 100644
--- a/lib/redmine/wiki_formatting/macros.rb
+++ b/lib/redmine/wiki_formatting/macros.rb
@@ -78,7 +78,7 @@ module Redmine
 
       desc "Displays a list of all available macros, including description if available."
       macro :macro_list do |obj, args|
-        out = ''
+        out = ''.html_safe
         @@available_macros.keys.collect(&:to_s).sort.each do |macro|
           out << content_tag('dt', content_tag('code', macro))
           out << content_tag('dd', textilizable(@@available_macros[macro.to_sym]))