diff --git a/src/opnsense/mvc/app/controllers/OPNsense/Diagnostics/Api/FirewallController.php b/src/opnsense/mvc/app/controllers/OPNsense/Diagnostics/Api/FirewallController.php
index 884d2a8cd..21009a5d2 100644
--- a/src/opnsense/mvc/app/controllers/OPNsense/Diagnostics/Api/FirewallController.php
+++ b/src/opnsense/mvc/app/controllers/OPNsense/Diagnostics/Api/FirewallController.php
@@ -77,7 +77,7 @@ class FirewallController extends ApiControllerBase
                 $interfaces[] = !empty((string)$node->descr) ? (string)$node->descr : $key;
             }
         }
-
+        sort($interfaces, SORT_NATURAL|SORT_FLAG_CASE);
         return [
             "interface_name" => $interfaces,
             "dir" => ["in", "out"],