diff --git a/src/www/vpn_ipsec_phase1.php b/src/www/vpn_ipsec_phase1.php
index 77a60f695..f6892b50e 100644
--- a/src/www/vpn_ipsec_phase1.php
+++ b/src/www/vpn_ipsec_phase1.php
@@ -410,7 +410,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
         }
 
         /* if the remote gateway changed and the interface is not WAN then remove route */
-        if ($pconfig['interface'] != "wan") {
+        if ($pconfig['interface'] != 'wan') {
             if ($old_ph1ent['remote-gateway'] != $pconfig['remote-gateway']) {
                 /* XXX does this even apply? only use of system.inc at the top! */
                 system_host_route($old_ph1ent['remote-gateway'], $old_ph1ent['remote-gateway'], true, false);