diff --git a/NamedBuilderBag.php b/NamedBuilderBag.php
index 4fb69da8455e039eee21b4d18e3758b8a4e43a46..a7e194c09b208961f813e70e797a37e8f9f36c5c 100644
--- a/NamedBuilderBag.php
+++ b/NamedBuilderBag.php
@@ -105,7 +105,7 @@ class NamedBuilderBag
         return array_filter(
             $this->bag,
             /** @var NamedBuilderInterface $builder */
-            function ($builder) use ($type) {
+            function (NamedBuilderInterface $builder) use ($type) {
                 return $type === null || $builder->getType() == $type;
             }
         );