diff --git a/manifests/init.pp b/manifests/init.pp
index c2e537d8ca354673800d3a8dea6cb34b1ae031c8..0860c21736dd2cfcb09bfcfffd8dc5446c89d27f 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -25,7 +25,7 @@
 #
 class zfs {
 
-  if $operatingsystem in ['redhat', 'centos', 'scientific'] {
+  if $::operatingsystem in ['RedHat', 'CentOS', 'Scientific'] {
     package { 'zfs-release':
       ensure   => present,
       provider => rpm,