diff --git a/controllers/public/proposals_discussion_plugin_public_controller.rb b/controllers/public/proposals_discussion_plugin_public_controller.rb
index 491f502..0c06f2c 100644
--- a/controllers/public/proposals_discussion_plugin_public_controller.rb
+++ b/controllers/public/proposals_discussion_plugin_public_controller.rb
@@ -40,8 +40,8 @@ class ProposalsDiscussionPluginPublicController < ApplicationController
 
   def set_seed
     #XXX postgresql specific
-    seed_val = profile.connection.quote(cookies[:_noosfero_proposals_discussion_rand_seed])
-    profile.connection.execute("select setseed(#{seed_val})")
+    seed_val = ActiveRecord::Base.connection.quote(cookies[:_noosfero_proposals_discussion_rand_seed])
+    ActiveRecord::Base.connection.execute("select setseed(#{seed_val})")
   end
 
   def set_rand_cookie
--
libgit2 0.21.2