diff --git a/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/BooleanField.php b/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/BooleanField.php
index e92bc285c..060266744 100644
--- a/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/BooleanField.php
+++ b/src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/BooleanField.php
@@ -42,9 +42,12 @@ class BooleanField extends BaseField
     protected $internalIsContainer = false;
 
     /**
-     * @var string default validation message string
+     * {@inheritdoc}
      */
-    protected $internalValidationMessage = "value should be a boolean (0,1)";
+    protected function defaultValidationMessage()
+    {
+        return gettext('Value should be a boolean (0,1).');
+    }
 
     /**
      * retrieve field validators for this field type
@@ -52,13 +55,12 @@ class BooleanField extends BaseField
      */
     public function getValidators()
     {
-        // regexp for validating boolean values.
-        $regex_mask = "/^([0,1]){1}$/";
-
         $validators = parent::getValidators();
         if ($this->internalValue != null) {
-            $validators[] = new Regex(array('message' => $this->internalValidationMessage,
-                'pattern' => trim($regex_mask)));
+            $validators[] = new Regex([
+                'message' => $this->getValidationMessage(),
+                'pattern' => '/^[01]$/',
+            ]);
         }
         return $validators;
     }