diff --git a/extend/fast/Form.php b/extend/fast/Form.php
index d8f7a4b727c5be8a5af00412eb929bdb196d1629..b2dc44954016045f9985ce8e2440aa34edb48586 100644
--- a/extend/fast/Form.php
+++ b/extend/fast/Form.php
@@ -870,7 +870,7 @@ EOD;
         $checked = is_array($checked) ? $checked : explode(',', $checked);
         foreach ($list as $k => $v) {
             $options['id'] = "{$name}-{$k}";
-            $html[] = sprintf(Form::label("{$name}-{$k}", "%s {$v}"), Form::checkbox("{$name}[{$k}}]", $k, in_array($k, $checked), $options));
+            $html[] = sprintf(Form::label("{$name}-{$k}", "%s {$v}"), Form::checkbox("{$name}[{$k}]", $k, in_array($k, $checked), $options));
         }
         return '<div class="checkbox">' . implode(' ', $html) . '</div>';
     }