diff --git a/CHANGES b/CHANGES
index 7ebd7ecac..0246c9023 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,8 @@
+2023-02-16
+
+* The mailmark option in the Data Matrix encoder was replaced with a generic c40headerlength option.
+
+
 2022-10-19
 
 * The GS1 North American Coupon Code symbology was fixed.