diff --git a/CHANGES/Unreleased.txt b/CHANGES/Unreleased.txt
index ffda919570ae4f84c4578fb0c8de6fb9cb345059..38649abc46df7fce91c58b6940aaefd8a67e3674 100644
--- a/CHANGES/Unreleased.txt
+++ b/CHANGES/Unreleased.txt
@@ -86,6 +86,7 @@ Changes from version 2.0 which are relevant for developers:
   flag (--is-installed) to probe if running from a compilation directory or from a fully installed copy
   (this is needed for regtests to work properly).
 - Improved class Communicator. Many operations can now be done directly on Vectors, Tensors, std::vector and PLMD::Matrix.
+- Modified class RMSD.
 - Patches for GPL codes (QuantumEspresso and Gromacs) now also include
   original code so as to simplify their modification.
 - Fixed dependencies among actions such that it is now possible (and reliable)