diff --git a/changelog.txt b/changelog.txt
index 0bff9545..04986505 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -4,7 +4,7 @@ OPENSEADRAGON CHANGELOG
 1.2.1: (in progress)
 
 * Added preserveOverlays option (#561)
-* Fixed: DZI tilesource was broken (#563)
+* Fixed: DZI tilesource was broken on IE8/IE9 (#563)
 * Exposed secondary pointer button (middle, right, etc.) events from MouseTracker and through viewer (#479)
 * MouseTracker - Improved IE 8 compatibility (#562)