diff --git a/src/opnsense/scripts/OPNsense/Monit/carp_status b/src/opnsense/scripts/OPNsense/Monit/carp_status
new file mode 100755
index 000000000..13a4cb56d
--- /dev/null
+++ b/src/opnsense/scripts/OPNsense/Monit/carp_status
@@ -0,0 +1,47 @@
+#!/usr/local/bin/php
+<?php
+/*
+ *    Copyright (C) 2018 Deciso B.V.
+ *    All rights reserved.
+ *
+ *    Redistribution and use in source and binary forms, with or without
+ *    modification, are permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *
+ *    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ *    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ *    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ *    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *    POSSIBILITY OF SUCH DAMAGE.
+ */
+
+require_once("interfaces.lib.inc");
+
+$statuses = array();
+foreach (legacy_interfaces_details() as $intf) {
+    if (!empty($intf['carp'])) {
+        $statuses[$intf['carp']['status']] = true;
+    }
+}
+
+if (!empty($statuses['BACKUP'])) {
+    echo "BACKUP\n";
+    exit(1);
+} elseif (!empty($statuses['MASTER']) && count($statuses) == 1) {
+    echo "MASTER\n";
+    exit(0);
+} else {
+    echo implode(",", array_keys($statuses)) . "\n";
+    exit(-1);
+}