diff --git a/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/PortField.php b/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/PortField.php
index 439032c99..e6e0a6f24 100644
--- a/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/PortField.php
+++ b/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/PortField.php
@@ -164,12 +164,18 @@ class PortField extends BaseListField
     }
 
     /**
-     * always lowercase portnames
+     * always lowercase known portnames
      * @param string $value
      */
     public function setValue($value)
     {
-        parent::setValue(trim(strtolower($value)));
+        $tmp = trim(strtolower($value));
+        if ($this->enableWellKnown && in_array($tmp, ["any"] + self::$wellknownservices)) {
+            return parent::setValue($tmp);
+        } else {
+            return parent::setValue($value);
+        }
+
     }
 
     /**