diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index 9cc56b19e..71676467a 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -39,10 +39,9 @@ class Attachment < ActiveRecord::Base
 
 
   acts_as_activity_provider :type => 'course_files',
-                            :permission => :view_files,
                             :author_key => :author_id,
                             :find_options => {:select => "#{Attachment.table_name}.*",
-                                              :joins => "LEFT JOIN #{Course.table_name} ( #{Attachment.table_name}.container_type='Course' AND #{Attachment.table_name}.container_id = #{Course.table_name}.id )"}
+                                              :joins => "LEFT JOIN #{Course.table_name}  ON ( #{Attachment.table_name}.container_type='Course' AND #{Attachment.table_name}.container_id = #{Course.table_name}.id )"}
 
   acts_as_activity_provider :type => 'files',
                             :permission => :view_files,