diff --git a/CHANGES/v2.4.md b/CHANGES/v2.4.md
index ae03f3e0e325d10354d2cbbf06871fda15262422..13c07a5b46a310c48baed82d8edc8a19c3241bf6 100644
--- a/CHANGES/v2.4.md
+++ b/CHANGES/v2.4.md
@@ -208,6 +208,7 @@ For users:
   - Updated NAMD patches to version 2.12 and 2.13. Old patches have been removed.
   - GROMACS patch for gromacs-2018.4.
   - Fixed a bug in CS2BACKBONE when using more than 2 chains
+  - Fixed a threadsafety issue using forces on histograms
 
 For developers:
   - All fixed done in version 2.3.8