diff --git a/manifests/params.pp b/manifests/params.pp
index 5f088148..47d75013 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -4,20 +4,19 @@ class cinder::params {
   $cinder_conf = '/etc/cinder/cinder.conf'
   $cinder_paste_api_ini = '/etc/cinder/api-paste.ini'
 
-  case $::osfamily {
-    'Debian': {
-      $package_name      = 'cinder-common'
-      $api_package       = 'cinder-api'
-      $api_service       = 'cinder-api'
-      $scheduler_package = 'cinder-scheduler'
-      $scheduler_service = 'cinder-scheduler'
-      $volume_package    = 'cinder-volume'
-      $volume_service    = 'cinder-volume'
-      $db_sync_command   = 'cinder-manage db sync'
+  if $::osfamily == 'Debian' {
+    $package_name      = 'cinder-common'
+    $api_package       = 'cinder-api'
+    $api_service       = 'cinder-api'
+    $scheduler_package = 'cinder-scheduler'
+    $scheduler_service = 'cinder-scheduler'
+    $volume_package    = 'cinder-volume'
+    $volume_service    = 'cinder-volume'
+    $db_sync_command   = 'cinder-manage db sync'
 
-      $tgt_package_name  = 'tgt'
-      $tgt_service_name  = 'tgt'
-
-    }
+    $tgt_package_name  = 'tgt'
+    $tgt_service_name  = 'tgt'
+  } else {
+    fail("unsuported osfamily ${::osfamily}, currently Debian is the only supported platform")
   }
 }