diff --git a/readme.md b/readme.md
index 3988c92..de49ca6 100644
--- a/readme.md
+++ b/readme.md
@@ -35,6 +35,7 @@ var feed = new RSS(feedOptions);
  * `categories` _optional_ **array of strings**  One or more categories this feed belongs to.
  * `pubDate` _optional_ **Date object or date string** The publication date for content in the feed
  * `ttl` _optional_ **integer** Number of minutes feed can be cached before refreshing from source.
+ * `hub` _optional_ **PubSubHubbub hub url** Where is the PubSubHubb hub located.
 
 ### Add items to a feed