diff --git a/CHANGES/v2.1.txt b/CHANGES/v2.1.txt
index a8ee9b17ad189851404c2b1b01694350fbb5621b..f68c1c6c2b3c0fc480a3f538893d5124c7bec26d 100644
--- a/CHANGES/v2.1.txt
+++ b/CHANGES/v2.1.txt
@@ -221,6 +221,12 @@ Unreleased changes (will be included in 2.1.4)
 See branch \branch{v2.1} on git repository.
 
 For users:
+- Fixed NAMD patch. Masses and charges were not passed correctly, thus resulting in wrong
+  \ref COM or \ref CENTER with MASS.
+  This fix required repatching NAMD.
+  Notice that this bug was present also in v2.0 but in a different form.
+  More information here (\issue{162}), including a workaround that allows masses to be fixed
+  without repatching.
 - Fixed erroneously reported message about MPI at the end of ./configure.
 - Changed warning message about undocumented components.
 - PLUMED now says in the log file if it was compiled from a dirty git repository.