diff --git a/composer.json b/composer.json
index d1e9288..4f9f0ce 100644
--- a/composer.json
+++ b/composer.json
@@ -26,5 +26,6 @@
     },
     "autoload": {
         "psr-0": { "TwigGenerator": "src/" }
-    }
+    },
+    "minimum-stability": "dev"
 }
diff --git a/src/TwigGenerator/Builder/BaseBuilder.php b/src/TwigGenerator/Builder/BaseBuilder.php
index 2a9755d..30b77eb 100644
--- a/src/TwigGenerator/Builder/BaseBuilder.php
+++ b/src/TwigGenerator/Builder/BaseBuilder.php
@@ -324,7 +324,14 @@ protected function loadTwigFilters(\Twig_Environment $twig)
     {
         foreach ($this->twigFilters as $twigFilter) {
             if (is_object($twigFilter)) {
-                $twig->addFilter($twigFilter);
+                if (method_exists($twigFilter, 'getName')) {
+                    $twig->addFilter($twigFilter);
+                } else {
+                    $filter = new \ReflectionObject($twigFilter);
+                    $name = $filter->getProperty('method');
+                    $name->setAccessible(true);
+                    $twig->addFilter($name->getValue($twigFilter), $twigFilter);
+                }
                 continue;
             } elseif (($pos = strpos($twigFilter, ':')) !== false) {
                 $twigFilterName = substr($twigFilter, $pos + 2);