diff --git a/lib/widget/sfWidgetFormChoice.class.php b/lib/widget/sfWidgetFormChoice.class.php
index dc83904a4..ca698f109 100644
--- a/lib/widget/sfWidgetFormChoice.class.php
+++ b/lib/widget/sfWidgetFormChoice.class.php
@@ -26,6 +26,8 @@ class sfWidgetFormChoice extends sfWidgetFormChoiceBase
     public function setIdFormat($format)
     {
         $this->options['renderer_options']['id_format'] = $format;
+
+        return $this;
     }
 
     /**