diff --git a/src/openseadragon.js b/src/openseadragon.js
index 9ce9adca..f8b744de 100644
--- a/src/openseadragon.js
+++ b/src/openseadragon.js
@@ -221,6 +221,10 @@
   *
   * @property {Number} [maxZoomLevel=null]
   *
+  * @property {Boolean} [homeFillsViewer=false]
+  *     Make the 'home' button fill the viewer and clip the image, instead
+  *     of fitting the image to the viewer and letterboxing.
+  *
   * @property {Boolean} [panHorizontal=true]
   *     Allow horizontal pan.
   *