diff --git a/lib/Resque/Job.php b/lib/Resque/Job.php
index 1eb8fdb..344c6c1 100755
--- a/lib/Resque/Job.php
+++ b/lib/Resque/Job.php
@@ -47,6 +47,7 @@ class Resque_Job
 	 * @param string $class The name of the class that contains the code to execute the job.
 	 * @param array $args Any optional arguments that should be passed when the job is executed.
 	 * @param boolean $monitor Set to true to be able to monitor the status of a job.
+	 * @param string $id Unique identifier for tracking the job. Generated if not supplied.
 	 *
 	 * @return string
 	 */