diff --git a/manifests/ppa.pp b/manifests/ppa.pp
index d6b4900760..556287ef6b 100644
--- a/manifests/ppa.pp
+++ b/manifests/ppa.pp
@@ -14,7 +14,7 @@
     fail('apt::ppa is not currently supported on Debian.')
   }
 
-  $filename_without_slashes = regsubst($name, '/', '-', 'G')
+  $filename_without_slashes = regsubst($name, '/', '-ubuntu-', 'G')
   $filename_without_dots    = regsubst($filename_without_slashes, '\.', '_', 'G')
   $filename_without_pluses  = regsubst($filename_without_dots, '\+', '_', 'G')
   $filename_without_ppa     = regsubst($filename_without_pluses, '^ppa:', '', 'G')