diff --git a/omegat/project_save.tmx b/omegat/project_save.tmx
index 3e788bbf..f4d086b4 100644
--- a/omegat/project_save.tmx
+++ b/omegat/project_save.tmx
@@ -8867,6 +8867,7 @@ cl}.</seg>
       </tuv>
     </tu>
     <tu>
+      <note>period = point</note>
       <tuv lang="en">
         <seg>@kbd{.} (period, @code{dired-clean-directory}) flags just some of the backup files for deletion: all but the oldest few and newest few backups of any one file.</seg>
       </tuv>