diff --git a/lib/ext/entities.rb b/lib/ext/entities.rb
index e4f8e5b..8db4a93 100644
--- a/lib/ext/entities.rb
+++ b/lib/ext/entities.rb
@@ -19,7 +19,7 @@ module Noosfero
         root :proposals, :proposal
         expose :id, :position, :abstract, :body, :votes_for, :votes_against
         expose :hits, :effective_support, :proposal_id, :created_at
-        expose :updated_at, :slug
+        expose :updated_at, :slug, :categories
       end
 
     end
diff --git a/lib/proposals_discussion_plugin/ranking_item.rb b/lib/proposals_discussion_plugin/ranking_item.rb
index fa199a7..8b1c61c 100644
--- a/lib/proposals_discussion_plugin/ranking_item.rb
+++ b/lib/proposals_discussion_plugin/ranking_item.rb
@@ -4,6 +4,6 @@ class ProposalsDiscussionPlugin::RankingItem < ActiveRecord::Base
 
   attr_accessible :proposal, :abstract, :votes_for, :votes_against, :hits, :effective_support
 
-  delegate :body, :slug, :to => :proposal
+  delegate :body, :slug, :categories, :to => :proposal
 
 end
--
libgit2 0.21.2