diff --git a/mongrel/manifests/init.pp b/mongrel/manifests/init.pp
index 275293f..f65dfc4 100644
--- a/mongrel/manifests/init.pp
+++ b/mongrel/manifests/init.pp
@@ -7,18 +7,18 @@ class mongrel {
 
     package { "mongrel":
         ensure   => installed,
-        name     => $operatingsystem ? {
+        name     => $::operatingsystem ? {
             openbsd => "ruby-mongrel",
             debian  => "mongrel",
             ubuntu  => "mongrel",
-            centos  => $operatingsystemrelease ? {
+            centos  => $::operatingsystemrelease ? {
                 /^[1-5]/ => "rubygem-mongrel",
                 default  => "mongrel",
             },
             default => "rubygem-mongrel",
         },
-        provider => $operatingsystem ? {
-            centos  => $operatingsystemrelease ? {
+        provider => $::operatingsystem ? {
+            centos  => $::operatingsystemrelease ? {
                 /^[1-5]/ => undef,
                 default  => "gem",
             },