diff --git a/lib/redmine/wiki_formatting/macros.rb b/lib/redmine/wiki_formatting/macros.rb
index 2f9dd99eb..de23eabb0 100644
--- a/lib/redmine/wiki_formatting/macros.rb
+++ b/lib/redmine/wiki_formatting/macros.rb
@@ -77,7 +77,7 @@ module Redmine
       end
 
       desc "Displays a list of all available macros, including description if available."
-      macro :macro_list do
+      macro :macro_list do |obj, args|
         out = ''
         @@available_macros.keys.collect(&:to_s).sort.each do |macro|
           out << content_tag('dt', content_tag('code', macro))