diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index e93a48392abf881143072e0c45ba98c5a24a3a81..8891b9639dcdac2c2c38132c8028cd0836951e91 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -21,7 +21,8 @@ Changes In Release 1.3.0
     system of Python: Instead of storing the modules in lib{64}/ost/ost, they
     are now in lib{64}/python{{VERSION}}/site-packages/ost
   * Added molck, the molecular checker. A small command-line tool to clean PDB 
-    files, e.g. remove atoms with zero occupancy, "atoms", hydrogens etc.
+    files, e.g. remove atoms with zero occupancy, "virtual atoms", hydrogens 
+    etc.
 
 Changes In Release 1.2.3
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