diff --git a/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/UniqueIdField.php b/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/UniqueIdField.php
index f50ff1cc0..f179cee76 100644
--- a/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/UniqueIdField.php
+++ b/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/UniqueIdField.php
@@ -41,11 +41,6 @@ class UniqueIdField extends BaseField
      */
     protected $internalIsContainer = false;
 
-    /**
-     * @var string default validation message string
-     */
-    protected $internalValidationMessage = "Unique ID is immutable";
-
     /**
      * @var null|string initial field value
      */
@@ -67,8 +62,10 @@ class UniqueIdField extends BaseField
         }
         $validators = parent::getValidators();
         // unique id may not change..
-        $validators[] = new InclusionIn(array('message' => $this->internalValidationMessage,
-            'domain' => array($this->initialValue)));
+        $validators[] = new InclusionIn([
+            'message' => gettext('Unique ID is immutable.'),
+            'domain' => [$this->initialValue],
+        ]);
         return $validators;
     }
 }