diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
index c291c26af..e52518c0f 100644
--- a/documentation/RELEASE_NOTES.html
+++ b/documentation/RELEASE_NOTES.html
@@ -229,6 +229,7 @@ affect vxWorks-(intel) targets.</p>
 
 <h4>RTEMS</h4>
 
+<p>Create a POSIX-compliant TZ environment variable from EPICS_TIMEZONE.  Previous versions had an incorrect format which was ignored by tzset().</p>
 <p>Added space for user extensions.  This provides the infrastructure for the
 spy command.</p>
 <p>Fixed error in epicsThreadGetName for non-EPICS threads.</p>