src/CdnFarfutureController.php | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/CdnFarfutureController.php b/src/CdnFarfutureController.php
index bac36cf..aad83a6 100644
--- a/src/CdnFarfutureController.php
+++ b/src/CdnFarfutureController.php
@@ -29,13 +29,14 @@ class CdnFarfutureController {
   protected $fileSystem;
 
   /**
-   * The private key service.
-   *
    * @param \Drupal\Core\PrivateKey $private_key
+   *   The private key service.
+   * @param \Drupal\Core\File\FileSystemInterface $file_system
+   *   The file system service.
    */
-  public function __construct(PrivateKey $private_key, FileSystemInterface $fileSystem) {
+  public function __construct(PrivateKey $private_key, FileSystemInterface $file_system) {
     $this->privateKey = $private_key;
-    $this->fileSystem = $fileSystem;
+    $this->fileSystem = $file_system;
   }
 
   /**