diff --git a/changelog.txt b/changelog.txt
index 39c24d5e..0fe01652 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -46,6 +46,7 @@ OPENSEADRAGON CHANGELOG
 * The navigator now picks up opacity and compositeOperation changes (#1203)
 * New events for opacity and compositeOperation changes (#1203)
 * Fixed: The reference strip didn't show the initial page if it wasn't the first page (#1208)
+* Added support for setting debug mode after the Viewer object has been constructed (#1224)
 
 2.2.1: