diff --git a/website/docs/cron.md b/website/docs/cron.md
index 52833c0b..6b32a939 100644
--- a/website/docs/cron.md
+++ b/website/docs/cron.md
@@ -230,8 +230,10 @@ has the following properties:
 
 - `task` (required): the string identifier of the task that should be executed
   (same as the first argument to `add_job`)
-- `pattern` (required): a cron pattern (e.g. `* * * * *`) describing when to run
-  this task
+- `match` (required): a cron pattern (e.g. `* * * * *`) describing when to run,
+  or a callback function passed a TimestampDigest and returning a boolean
+  whether the cron should fire for this timestamp (true) or not (false) this
+  task
 - `options`: optional options influencing backfilling, etc
   - `backfillPeriod`: how long (in milliseconds) to backfill (see above)
   - `maxAttempts`: the maximum number of attempts we'll give the job