diff --git a/src/Illuminate/Support/Arr.php b/src/Illuminate/Support/Arr.php
index 51d949ab7e98..616c030c5fe3 100755
--- a/src/Illuminate/Support/Arr.php
+++ b/src/Illuminate/Support/Arr.php
@@ -541,7 +541,7 @@ public static function set(&$array, $key, $value)
      * Shuffle the given array and return the result.
      *
      * @param  array  $array
-     * @param  int  $seed
+     * @param  int|null  $seed
      * @return array
      */
     public static function shuffle($array, $seed = null)