diff --git a/changelog.txt b/changelog.txt
index 980d78a1..531af964 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -3,6 +3,8 @@ OPENSEADRAGON CHANGELOG
 
 2.3.1: (In Progress)
 
+* Debug mode now uses different colors for different tiled images (customizable via debugGridColor) (#1271)
+
 2.3.0:
 
 * BREAKING CHANGE: Tile.distance has been removed (#1027)