diff --git a/changelog.txt b/changelog.txt
index 7a747759..6ab20b94 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -24,6 +24,7 @@ OPENSEADRAGON CHANGELOG
 * Fixed pointer event model detection for IE 10 and IE 11 (#571)
 * Added setMouseNavEnabled() support to Navigator (#572)
 * Removed Viewer focusHandler/onCanvasFocus (#577)
+* Added tabIndex option to viewer (#577)
 
 1.2.0: