diff --git a/lib/noosfero/api/entities.rb b/lib/noosfero/api/entities.rb
index 9f53ecc..98db94b 100644
--- a/lib/noosfero/api/entities.rb
+++ b/lib/noosfero/api/entities.rb
@@ -239,6 +239,11 @@ module Noosfero
       class Activity < Entity
         root 'activities', 'activity'
         expose :id, :params, :verb, :created_at, :updated_at, :comments_count, :visible
+        expose :user, :using => Profile
+        expose :target do |activity, opts|
+          type_map = {Profile => ::Profile, ArticleBase => ::Article}.find {|h| activity.target.kind_of?(h.last)}
+          type_map.first.represent(activity.target) unless type_map.nil?
+        end
       end
 
     end
--
libgit2 0.21.2