diff --git a/lib/redmine/activity.rb b/lib/redmine/activity.rb
index 3189f4fb1..c972eeee2 100644
--- a/lib/redmine/activity.rb
+++ b/lib/redmine/activity.rb
@@ -42,7 +42,7 @@ module Redmine
         @@available_event_types << event_type unless @@available_event_types.include?(event_type)
         @@default_event_types << event_type unless options[:default] == false
         if options[:plugin]
-          providers.each do | provider |
+          providers.each do |provider|
             @@plugins_event_classes[provider] = options[:plugin].to_s
           end
         end