diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 7fa72744ab8b0779c24e9f1a12418f72c903e4c8..a4bf4249afbd9399fdbb06c9d6ac49406d4939de 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,3 +1,9 @@
+Changes in Release x.x.x
+--------------------------------------------------------------------------------
+
+ * heavy water (DOD) is now recognised as 'water' instead of 'non-polymer' by
+   the compounds library.
+
 Changes in Release 2.7.0
 --------------------------------------------------------------------------------