diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AnnotationsCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AnnotationsCacheWarmer.php
index 340198e5e2c1b..523d5a34b4e65 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AnnotationsCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AnnotationsCacheWarmer.php
@@ -85,7 +85,7 @@ protected function doWarmUp($cacheDir, ArrayAdapter $arrayAdapter)
         return true;
     }
 
-    private function readAllComponents(Reader $reader, $class)
+    private function readAllComponents(Reader $reader, string $class)
     {
         $reflectionClass = new \ReflectionClass($class);
         $reader->getClassAnnotations($reflectionClass);
diff --git a/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php b/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
index b6ae6b7ecf22a..f1cb0fe14dea3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
+++ b/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
@@ -141,7 +141,7 @@ public function build(ContainerBuilder $container)
         }
     }
 
-    private function addCompilerPassIfExists(ContainerBuilder $container, $class, $type = PassConfig::TYPE_BEFORE_OPTIMIZATION, $priority = 0)
+    private function addCompilerPassIfExists(ContainerBuilder $container, string $class, string $type = PassConfig::TYPE_BEFORE_OPTIMIZATION, int $priority = 0)
     {
         $container->addResource(new ClassExistenceResource($class));