diff --git a/manifests/hostkeys.pp b/manifests/hostkeys.pp
index 86176f679..68e039438 100644
--- a/manifests/hostkeys.pp
+++ b/manifests/hostkeys.pp
@@ -1,11 +1,13 @@
 class ssh::hostkeys {
+  $host_aliases = [ $::fqdn, $::hostname, $::ipaddress ]
+
   @@sshkey { "${::fqdn}_dsa":
-    host_aliases => [ $::fqdn, $::hostname, $::ipaddress ],
+    host_aliases => $host_aliases,
     type         => dsa,
     key          => $::sshdsakey,
   }
   @@sshkey { "${::fqdn}_rsa":
-    host_aliases => [ $::fqdn, $::hostname, $::ipaddress ],
+    host_aliases => $host_aliases,
     type         => rsa,
     key          => $::sshrsakey,
   }