diff --git a/python/lammps/pylammps.py b/python/lammps/pylammps.py
index b959cf7d65..7de23ecf43 100644
--- a/python/lammps/pylammps.py
+++ b/python/lammps/pylammps.py
@@ -197,7 +197,7 @@ class Atom(object):
     mass (AKA 'rmass') depending on what is available with
     preference for the per-atom mass.
 
-    .. versionchanged:: TBD
+    .. versionchanged:: 2Aug2023_update_4
 
        Support both per-type and per-atom masses. With
        per-type return "mass[type[i]]" else return "rmass[i]".