diff --git a/src/Symfony/Bundle/TwigBundle/Extension/FormExtension.php b/src/Symfony/Bundle/TwigBundle/Extension/FormExtension.php
index 3aac830ab0737..b10d3ad6400d8 100644
--- a/src/Symfony/Bundle/TwigBundle/Extension/FormExtension.php
+++ b/src/Symfony/Bundle/TwigBundle/Extension/FormExtension.php
@@ -154,6 +154,10 @@ public function renderLabel(FieldInterface $field, $label = null, array $attribu
 
     public function renderWidget(FieldInterface $field, array $attributes = array(), $resources = null)
     {
+        if (null === $this->templates) {
+            $this->templates = $this->resolveResources($this->resources);
+        }
+        
         if (null === $resources) {
             $parent = $field;
             $resources = array();