diff --git a/manifests/params/node.pp b/manifests/params/node.pp
index 0f736d5..587733a 100644
--- a/manifests/params/node.pp
+++ b/manifests/params/node.pp
@@ -1,70 +1,70 @@
 class munin::params::node {
 
   $message = "Unsupported osfamily: ${::osfamily}"
 
   $address        = $::fqdn
   $host_name      = $::fqdn
   $allow          = []
   $masterconfig   = []
   $mastergroup    = ''
   $mastername     = ''
   $nodeconfig     = []
   $plugins        = {}
   $service_ensure = ''
   $export_node    = 'enabled'
 
   case $::osfamily {
-    RedHat: {
+    'RedHat': {
       $config_root  = '/etc/munin'
       $log_dir      = '/var/log/munin-node'
       $service_name = 'munin-node'
       $package_name = 'munin-node'
       $plugin_share_dir = '/usr/share/munin/plugins'
       $file_group   = 'root'
     }
-    Debian: {
+    'Debian': {
       $config_root  = '/etc/munin'
       $log_dir      = '/var/log/munin'
       $service_name = 'munin-node'
       $package_name = 'munin-node'
       $plugin_share_dir = '/usr/share/munin/plugins'
       $file_group   = 'root'
     }
-    Solaris: {
+    'Solaris': {
       case $::operatingsystem {
-        SmartOS: {
+        'SmartOS': {
           $config_root  = '/opt/local/etc/munin'
           $log_dir      = '/var/opt/log/munin'
           $service_name = 'smf:/munin-node'
           $package_name = 'munin-node'
           $plugin_share_dir = '/opt/local/share/munin/plugins'
           $file_group   = 'root'
         }
         default: {
           fail("Unsupported operatingsystem ${::operatingsystem} for osfamily ${::osfamily}")
         }
       }
     }
-    FreeBSD, DragonFly: {
+    'FreeBSD', 'DragonFly': {
       $config_root  = '/usr/local/etc/munin'
       $log_dir      = '/var/log/munin'
       $service_name = 'munin-node'
       $package_name = 'munin-node'
       $plugin_share_dir = '/usr/local/share/munin/plugins'
       $file_group   = 'wheel'
     }
-    OpenBSD: {
+    'OpenBSD': {
       $config_root  = '/etc/munin'
       $log_dir      = '/var/log/munin'
       $service_name = 'munin_node'
       $package_name = 'munin-node'
       $plugin_share_dir = '/usr/local/libexec/munin/plugins'
       $file_group   = 'wheel'
     }
     default: {
       fail($message)
     }
   }
 }