diff --git a/src/Form/FormCheckBoxExtended.php b/src/Form/FormCheckBoxExtended.php
index 7de1abb..7a90606 100755
--- a/src/Form/FormCheckBoxExtended.php
+++ b/src/Form/FormCheckBoxExtended.php
@@ -51,6 +51,7 @@ class FormCheckBoxExtended extends Widget
      * @var string
      */
     protected $strPrefix = 'widget widget-checkbox widget-extended-checkbox';
+    protected $prefix = 'widget widget-checkbox widget-extended-checkbox';
 
     /**
      * @var array
@@ -96,6 +97,11 @@ public function __set($strKey, $varValue): void
                 $this->arrConfiguration['mandatory'] = $varValue ? true : false;
                 break;
 
+            case 'prefix':
+                $this->prefix = $varValue;
+                $this->strPrefix = $varValue;
+                break;
+
             default:
                 parent::__set($strKey, $varValue);
                 break;