diff --git a/manifests/icinga2/objects/notifications.pp b/manifests/icinga2/objects/notifications.pp
index 6c12002..33aea62 100644
--- a/manifests/icinga2/objects/notifications.pp
+++ b/manifests/icinga2/objects/notifications.pp
@@ -1,16 +1,16 @@
 # Icinga2 notifications
 class profile::icinga2::objects::notifications {
   $notification_file = '/etc/icinga2/conf.d/notifications.conf'
 
   $type = 'service'
-  $apply_target = upcase($type[0]) + $type[1,-1]
+  $apply_target = "${type[0].upcase}${type[1,-1]}"
   $means = 'irc'
 
   ::icinga2::object::notification {"${means}-notify-all-${type}s":
     import       => ["${means}-${type}-notification"],
     apply        => true,
     apply_target => $apply_target,
     users        => ['root'],
     target       => $notification_file,
   }
 }