diff --git a/manifests/params.pp b/manifests/params.pp
index 9c85b6f..28da13e 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -6,13 +6,16 @@ class apt::params () {
   $use_next_release = false
   $debian_url = 'http://httpredir.debian.org/debian/'
   $security_url = 'http://security.debian.org/'
+  $ubuntu_url = 'http://archive.ubuntu.com/ubuntu'
   $backports_url = $::debian_codename ? {
     'squeeze'  => 'http://backports.debian.org/debian-backports/',
-    default => $debian_url
+    default => $::operatingsystem ? {
+      'Ubuntu' => $ubuntu_url,
+      default  => $debian_url,
+    }
   }
   $lts_url = $debian_url
   $volatile_url = 'http://volatile.debian.org/debian-volatile/'
-  $ubuntu_url = 'http://archive.ubuntu.com/ubuntu'
   $repos = 'auto'
   $custom_preferences = ''
   $disable_update = false