diff --git a/manifests/init.pp b/manifests/init.pp
index 3921ade4c723d0e491e0d4bb83e16fda88006735..e5456d0d34bef02c6ca4ced46174b74459f7d90b 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -37,7 +37,7 @@ class shorewall {
   case $non_torified_users {
     '': { $non_torified_users = [] }
   }
-  $real_non_torified_users = uniq_flatten($tor_user, $non_torified_users)
+  $real_non_torified_users = uniq_flatten([ $tor_user, $non_torified_users ])
 
   file {"/var/lib/puppet/modules/shorewall":
     ensure => directory,