diff --git a/System/File/ContainerInterface.php b/System/File/ContainerInterface.php
index 403f4e1c0..5a0af0006 100644
--- a/System/File/ContainerInterface.php
+++ b/System/File/ContainerInterface.php
@@ -315,11 +315,11 @@ interface ContainerInterface
     /**
      * Get the permissions id of the resource.
      *
-     * @return string Permissions (e.g. 0644);
+     * @return int Permissions (e.g. 0644);
      *
      * @since  1.0.0
      */
-    public function getPermission() : string;
+    public function getPermission() : int;
 
     /**
      * (Re-)Initialize resource
diff --git a/System/File/Local/FileAbstract.php b/System/File/Local/FileAbstract.php
index 46a81b8ab..adbba652b 100644
--- a/System/File/Local/FileAbstract.php
+++ b/System/File/Local/FileAbstract.php
@@ -88,7 +88,7 @@ abstract class FileAbstract implements ContainerInterface
     /**
      * Permission.
      *
-     * @var string
+     * @var int
      * @since 1.0.0
      */
     protected $permission = 0644;
@@ -176,7 +176,7 @@ abstract class FileAbstract implements ContainerInterface
     /**
      * {@inheritdoc}
      */
-    public function getPermission() : string
+    public function getPermission() : int
     {
         return $this->permission;
     }