diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
index b80fa9bee..536455c59 100644
--- a/documentation/RELEASE_NOTES.html
+++ b/documentation/RELEASE_NOTES.html
@@ -18,6 +18,9 @@
 <h2>Changes since 3.14.2</h2>
 </center>
 
+<p><strong>iocshArgPersistentString</strong></p>
+<p>Tell iocsh to make a copy of the argument string before passing it to the handler function.</p>
+
 <p><strong>epicsStrDup</strong></p>
 <p>Operating-system independent replacement for strdup().</p>