diff --git a/CHANGES/v2.3.txt b/CHANGES/v2.3.txt
index 9c908072c4a1b47ed9158c811c25fc8863d52b54..59efaeaf713fa625ddd11104f4f8960ada18f0f8 100644
--- a/CHANGES/v2.3.txt
+++ b/CHANGES/v2.3.txt
@@ -243,5 +243,6 @@ For developers:
   from the interactive menu.
 - Install newer ccache on travis-ci, build faster.
 - Small fix in provided env modules (`PLUMED_VIMPATH` is set also when shared libraries are disabled).
+- Added some more debug macros when configuring with `--debug-glibcxx`.
 
 */