diff --git a/app/models/project.rb b/app/models/project.rb
index 9a7d8722..33078dd7 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -353,7 +353,7 @@ class Project < ActiveRecord::Base
   # Returns an array of the trackers used by the project and its active sub projects
   def rolled_up_trackers
     @rolled_up_trackers ||=
-      Tracker.find(:all, :include => :projects,
+      Tracker.find(:all, :joins => :projects,
                          :select => "DISTINCT #{Tracker.table_name}.*",
                          :conditions => ["#{Project.table_name}.lft >= ? AND #{Project.table_name}.rgt <= ? AND #{Project.table_name}.status = #{STATUS_ACTIVE}", lft, rgt],
                          :order => "#{Tracker.table_name}.position")