diff --git a/doctrine/doctrine-fixtures-bundle/3.0/src/DataFixtures/AppFixtures.php b/doctrine/doctrine-fixtures-bundle/3.0/src/DataFixtures/AppFixtures.php
index 6c20526f..987f6fe9 100644
--- a/doctrine/doctrine-fixtures-bundle/3.0/src/DataFixtures/AppFixtures.php
+++ b/doctrine/doctrine-fixtures-bundle/3.0/src/DataFixtures/AppFixtures.php
@@ -7,7 +7,7 @@ use Doctrine\Persistence\ObjectManager;
 
 class AppFixtures extends Fixture
 {
-    public function load(ObjectManager $manager)
+    public function load(ObjectManager $manager): void
     {
         // $product = new Product();
         // $manager->persist($product);