diff --git a/changelog.txt b/changelog.txt
index 8d2e670c..133af508 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -52,6 +52,7 @@ OPENSEADRAGON CHANGELOG
 * Better calculation for TileCache release cutoff (#1214)
 * Fixed: One image failing to load could cause the others to never load (#1229)
 * Added functions for dynamically adding and removing the reference strip in sequence mode (#1213)
+* Added ability to provide thumbnail URLs for reference strip (#1241)
 
 2.2.1:
 
diff --git a/src/tilesource.js b/src/tilesource.js
index bb3e433e..b40598ae 100644
--- a/src/tilesource.js
+++ b/src/tilesource.js
@@ -61,7 +61,7 @@
  * @param {String} [options.url]
  *      The URL for the data necessary for this TileSource.
  * @param {String} [options.referenceStripThumbnailUrl]
- *      The URL for the thumbnail image to be used by the reference strip
+ *      The URL for a thumbnail image to be used by the reference strip
  * @param {Function} [options.success]
  *      A function to be called upon successful creation.
  * @param {Boolean} [options.ajaxWithCredentials]