diff --git a/network/manifests/init.pp b/network/manifests/init.pp
index 19026e4..196b98c 100644
--- a/network/manifests/init.pp
+++ b/network/manifests/init.pp
@@ -150,7 +150,7 @@ class network::hostname {
 # }
 #
 define network::interface($ipaddr = "none", $eaddr = "none", $netmask = "none",
-			  $dnsnameservers = "none", $dnssearch = "none",
+                          $dnsnameservers = "none", $dnssearch = "none",
                           $ip6addr = "none", $ip6netmask = "64",
                           $bridge = [], $options = [], $postcmd = []) {
 
@@ -358,14 +358,14 @@ define network::route($gateway = "", $device, $ipv6gateway = "") {
 #     password => "secret",
 # }
 #
-define network::carp($password, $ipaddr, $netmask, $options = []) {
+define network::carp($password, $ipaddr, $netmask, $options = [], $postcmd = []) {
     case $::operatingsystem {
         "openbsd": {
             network::interface { "carp${name}":
                 ipaddr  => $ipaddr,
                 netmask => $netmask,
                 options => [ "vhid ${name}", "pass ${password}", $options ],
-                postcmd => [ "/usr/sbin/ndp -i carp${name} -- -accept_rtadv" ],
+                postcmd => merge([ "/usr/sbin/ndp -i carp${name} -- -accept_rtadv" ], $postcmd),
             }
         }
         "centos","redhat","fedora": {