diff --git a/CHANGES/v2.4.txt b/CHANGES/v2.4.txt
index c7c15e866cd6b4286a779f11071c1b2d854eb08d..464e724a1eb25f1cc0413877cee2532f84e91e1c 100644
--- a/CHANGES/v2.4.txt
+++ b/CHANGES/v2.4.txt
@@ -10,6 +10,8 @@ Changes from version 2.3 which are relevant for users:
     - gcc 4.8
     - clang 3.3
     - intel 15
+- New collective variables:
+  -  \ref DIMER (thanks to Marco Nava).
 - Other changes:
   - \ref PBMETAD : multiple walkers using files (thanks to Marco De La Pierre).
   - \ref PBMETAD : adaptive gaussians