diff --git a/src/www/system_advanced_network.php b/src/www/system_advanced_network.php
index 60b3eee27..20836baf4 100644
--- a/src/www/system_advanced_network.php
+++ b/src/www/system_advanced_network.php
@@ -134,6 +134,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     }
 }
 
+legacy_html_escape_form_data($pconfig);
 
 $pgtitle = array(gettext("System"),gettext("Settings"),gettext("Networking"));
 include("head.inc");