diff --git a/src/usr/local/www/firewall_nat.php b/src/usr/local/www/firewall_nat.php
index 3e390ce96a..335aff0502 100644
--- a/src/usr/local/www/firewall_nat.php
+++ b/src/usr/local/www/firewall_nat.php
@@ -36,13 +36,8 @@ require_once("filter.inc");
 require_once("shaper.inc");
 require_once("itemid.inc");
 
-if (!is_array($config['nat'])) {
-	$config['nat'] = array();
-}
-if (!is_array($config['nat']['rule'])) {
-	$config['nat']['rule'] = array();
-}
-
+init_config_arr(array('nat', 'separator'));
+init_config_arr(array('nat', 'rule'));
 $a_nat = &$config['nat']['rule'];
 
 /* update rule order, POST[rule] is an array of ordered IDs */
diff --git a/src/usr/local/www/firewall_nat_1to1.php b/src/usr/local/www/firewall_nat_1to1.php
index cb9d79bf2b..8e9bf99b32 100644
--- a/src/usr/local/www/firewall_nat_1to1.php
+++ b/src/usr/local/www/firewall_nat_1to1.php
@@ -35,10 +35,7 @@ require_once("functions.inc");
 require_once("filter.inc");
 require_once("shaper.inc");
 
-if (!is_array($config['nat']['onetoone'])) {
-	$config['nat']['onetoone'] = array();
-}
-
+init_config_arr(array('nat', 'onetoone'));
 $a_1to1 = &$config['nat']['onetoone'];
 
 /* update rule order, POST[rule] is an array of ordered IDs */
diff --git a/src/usr/local/www/firewall_nat_1to1_edit.php b/src/usr/local/www/firewall_nat_1to1_edit.php
index a82af6586e..37cb64f801 100644
--- a/src/usr/local/www/firewall_nat_1to1_edit.php
+++ b/src/usr/local/www/firewall_nat_1to1_edit.php
@@ -50,10 +50,7 @@ foreach ($ifdisp as $kif => $kdescr) {
 	$specialsrcdst[] = "{$kif}ip";
 }
 
-if (!is_array($config['nat']['onetoone'])) {
-	$config['nat']['onetoone'] = array();
-}
-
+init_config_arr(array('nat', 'onetoone'));
 $a_1to1 = &$config['nat']['onetoone'];
 
 if (isset($_REQUEST['id']) && is_numericint($_REQUEST['id'])) {
diff --git a/src/usr/local/www/firewall_nat_edit.php b/src/usr/local/www/firewall_nat_edit.php
index 32edb7c279..0caeb317ba 100644
--- a/src/usr/local/www/firewall_nat_edit.php
+++ b/src/usr/local/www/firewall_nat_edit.php
@@ -46,10 +46,8 @@ foreach ($ifdisp as $kif => $kdescr) {
 	$specialsrcdst[] = "{$kif}ip";
 }
 
-if (!is_array($config['nat']['rule'])) {
-	$config['nat']['rule'] = array();
-}
-
+init_config_arr(array('nat', 'separator'));
+init_config_arr(array('nat', 'rule'));
 $a_nat = &$config['nat']['rule'];
 
 if (isset($_REQUEST['id']) && is_numericint($_REQUEST['id'])) {
diff --git a/src/usr/local/www/firewall_nat_npt.php b/src/usr/local/www/firewall_nat_npt.php
index 367b3e20f4..7863c62c13 100644
--- a/src/usr/local/www/firewall_nat_npt.php
+++ b/src/usr/local/www/firewall_nat_npt.php
@@ -36,10 +36,7 @@ require_once("functions.inc");
 require_once("filter.inc");
 require_once("shaper.inc");
 
-if (!is_array($config['nat']['npt'])) {
-	$config['nat']['npt'] = array();
-}
-
+init_config_arr(array('nat', 'npt'));
 $a_npt = &$config['nat']['npt'];
 
 /* update rule order, POST[rule] is an array of ordered IDs */
diff --git a/src/usr/local/www/firewall_nat_npt_edit.php b/src/usr/local/www/firewall_nat_npt_edit.php
index df4be71788..fe3e4babdb 100644
--- a/src/usr/local/www/firewall_nat_npt_edit.php
+++ b/src/usr/local/www/firewall_nat_npt_edit.php
@@ -41,10 +41,7 @@ foreach ($ifdisp as $kif => $kdescr) {
 	$specialsrcdst[] = "{$kif}ip";
 }
 
-if (!is_array($config['nat']['npt'])) {
-	$config['nat']['npt'] = array();
-}
-
+init_config_arr(array('nat', 'npt'));
 $a_npt = &$config['nat']['npt'];
 
 if (isset($_REQUEST['id']) && is_numericint($_REQUEST['id'])) {
diff --git a/src/usr/local/www/firewall_nat_out.php b/src/usr/local/www/firewall_nat_out.php
index ba828d01d7..d8cfb2007c 100644
--- a/src/usr/local/www/firewall_nat_out.php
+++ b/src/usr/local/www/firewall_nat_out.php
@@ -38,17 +38,7 @@ require_once("shaper.inc");
 global $FilterIflist;
 global $GatewaysList;
 
-if (!is_array($config['nat'])) {
-	$config['nat'] = array();
-}
-if (!is_array($config['nat']['outbound'])) {
-	$config['nat']['outbound'] = array();
-}
-
-if (!is_array($config['nat']['outbound']['rule'])) {
-	$config['nat']['outbound']['rule'] = array();
-}
-
+init_config_arr(array('nat', 'outbound', 'rule'));
 $a_out = &$config['nat']['outbound']['rule'];
 
 // update rule order, POST[rule] is an array of ordered IDs
diff --git a/src/usr/local/www/firewall_nat_out_edit.php b/src/usr/local/www/firewall_nat_out_edit.php
index e425a8deca..9eeddacf0e 100644
--- a/src/usr/local/www/firewall_nat_out_edit.php
+++ b/src/usr/local/www/firewall_nat_out_edit.php
@@ -35,27 +35,10 @@ require_once("ipsec.inc");
 require_once("filter.inc");
 require_once("shaper.inc");
 
-if (!is_array($config['nat'])) {
-	$config['nat'] = array();
-}
-if (!is_array($config['nat']['outbound'])) {
-	$config['nat']['outbound'] = array();
-}
-
-if (!is_array($config['nat']['outbound']['rule'])) {
-	$config['nat']['outbound']['rule'] = array();
-}
-
+init_config_arr(array('nat', 'outbound', 'rule'));
 $a_out = &$config['nat']['outbound']['rule'];
 
-if (!is_array($config['aliases'])) {
-	$config['aliases'] = array();
-}
-
-if (!is_array($config['aliases']['alias'])) {
-	$config['aliases']['alias'] = array();
-}
-
+init_config_arr(array('aliases', 'alias'));
 $a_aliases = &$config['aliases']['alias'];
 
 if (isset($_REQUEST['id']) && is_numericint($_REQUEST['id'])) {