diff --git a/CHANGES/v2.4.md b/CHANGES/v2.4.md
index 1118ba45f811bcaa6e40b81aa9467f51efbfefd4..422b9ad0392ed969b4f1ea5a48e1723e92e37f43 100644
--- a/CHANGES/v2.4.md
+++ b/CHANGES/v2.4.md
@@ -243,5 +243,6 @@ For users:
   - Fixed a bug with \ref CONVERT_TO_FES and periodic variables, see \issue{441} (backported from v2.5.3).
   - More robust backup for output files when running over multiple processes
   - Fixed a regression in the performances of GEOMETRY based flexible hills in \ref METAD and \ref PBMETAD
+  - Fixed \issue{538}.