diff --git a/app/models/mailer.rb b/app/models/mailer.rb
index fbda2180a7..987d7c313c 100644
--- a/app/models/mailer.rb
+++ b/app/models/mailer.rb
@@ -88,7 +88,7 @@ class Mailer < ActionMailer::Base
     subject l(:mail_subject_reminder, :count => issues.size, :days => days)
     body :issues => issues,
          :days => days,
-         :issues_url => url_for(:controller => 'issues', :action => 'index', :set_filter => 1, :assigned_to_id => user.id, :sort_key => 'due_date', :sort_order => 'asc')
+         :issues_url => url_for(:controller => 'issues', :action => 'index', :set_filter => 1, :assigned_to_id => user.id, :sort => 'due_date:asc')
     render_multipart('reminder', body)
   end