diff --git a/etc/inc/interfaces.inc b/etc/inc/interfaces.inc
index 240a567..3e24570 100644
--- a/etc/inc/interfaces.inc
+++ b/etc/inc/interfaces.inc
@@ -1133,23 +1133,26 @@ function interface_bring_down($interface = "wan", $destroy = false, $ifacecfg =
 	if ($g['debug'])
 		log_error("Calling interface down for interface {$interface}, destroy is " . (($destroy) ? 'true' : 'false'));
 
-	if ($ifacecfg === false)
+	if ($ifacecfg === false) {
 		$ifcfg = $config['interfaces'][$interface];
-	else if (!is_array($ifacecfg))
+		$ppps = $config['ppps']['ppp'];
+		$realif = get_real_interface($interface);
+	} elseif (!is_array($ifacecfg)) {
 		log_error(gettext("Wrong parameters used during interface_bring_down"));
-	else
-		$ifcfg = $ifacecfg;
-		
+	} else {
+		$ifcfg = $ifacecfg['ifcfg'];
+		$ppps = $ifacecfg['ppps'];
 
-	$realif = get_real_interface($interface);
+		/* Detect the old realif */
+	}
 
 	switch ($ifcfg['ipaddr']) {
 	case "ppp":
 	case "pppoe":
 	case "pptp":
 	case "l2tp":
-		if (is_array($config['ppps']['ppp']) && count($config['ppps']['ppp'])) {
-			foreach ($config['ppps']['ppp'] as $pppid => $ppp) {
+		if (is_array($ppps) && count($ppps)) {
+			foreach ($ppps as $pppid => $ppp) {
 				if ($realif == $ppp['if']) {
 					if (isset($ppp['ondemand']) && !$destroy){
 						send_event("interface reconfigure {$interface}");
diff --git a/usr/local/www/interfaces.php b/usr/local/www/interfaces.php
index 7a1abe1..42c81af 100755
--- a/usr/local/www/interfaces.php
+++ b/usr/local/www/interfaces.php
@@ -86,6 +86,7 @@ $a_gateways = &$config['gateways']['gateway_item'];
 
 $wancfg = &$config['interfaces'][$if];
 $old_wancfg = $wancfg;
+$old_ppps = $a_ppps;
 // Populate page descr if it does not exist.
 if ($if == "wan" && !$wancfg['descr'])
 	$wancfg['descr'] = "WAN";
@@ -388,7 +389,8 @@ if ($_POST['apply']) {
 	} else {
 		$toapplylist = array();
 	}
-	$toapplylist[$if] = $wancfg;
+	$toapplylist[$if]['ifcfg'] = $wancfg;
+	$toapplylist[$if]['ppps'] = $a_ppps;
 	/* we need to be able remove IP aliases for IPv6 */
 	file_put_contents("{$g['tmp_path']}/.interfaces.apply", serialize($toapplylist));
 	header("Location: interfaces.php?if={$if}");
@@ -887,7 +889,8 @@ if ($_POST['apply']) {
 		} else {
 			$toapplylist = array();
 		}
-		$toapplylist[$if] = $old_wancfg;
+		$toapplylist[$if]['ifcfg'] = $old_wancfg;
+		$toapplylist[$if]['ppps'] = $old_ppps;
 		file_put_contents("{$g['tmp_path']}/.interfaces.apply", serialize($toapplylist));
 
 		mark_subsystem_dirty('interfaces');