diff --git a/src/Illuminate/Contracts/Cache/Lock.php b/src/Illuminate/Contracts/Cache/Lock.php
index 03f633a07a21..19da2b0d3eab 100644
--- a/src/Illuminate/Contracts/Cache/Lock.php
+++ b/src/Illuminate/Contracts/Cache/Lock.php
@@ -18,6 +18,8 @@ public function get($callback = null);
      * @param  int  $seconds
      * @param  callable|null  $callback
      * @return mixed
+     *
+     * @throws \Illuminate\Contracts\Cache\LockTimeoutException
      */
     public function block($seconds, $callback = null);