diff --git a/changelog.txt b/changelog.txt
index f67b632b..bbc3f324 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -12,6 +12,7 @@ OPENSEADRAGON CHANGELOG
 * Added getFullyLoaded method and "fully-loaded-change" event to TiledImage to know when tiles are fully loaded (#837)
 * Fixed: Initial tile load wasn't happening in parallel (#1014)
 * Added Zoomify tile source (#863)
+* Fixed problem with "sparse image" DZI files (#995)
 
 2.2.1:
 
diff --git a/src/dzitilesource.js b/src/dzitilesource.js
index 68647125..6c95dbee 100644
--- a/src/dzitilesource.js
+++ b/src/dzitilesource.js
@@ -198,7 +198,7 @@ $.extend( $.DziTileSource.prototype, $.TileSource.prototype, /** @lends OpenSead
             yMax = yMin + rect.height * scale;
 
             xMin = Math.floor( xMin / this._tileWidth );
-            yMin = Math.floor( yMin / this._tileWidth );
+            yMin = Math.floor( yMin / this._tileWidth ); // DZI tiles are square, so we just use _tileWidth
             xMax = Math.ceil( xMax / this._tileWidth );
             yMax = Math.ceil( yMax / this._tileWidth );