diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
index 3be476cd9..33f12c441 100644
--- a/documentation/RELEASE_NOTES.html
+++ b/documentation/RELEASE_NOTES.html
@@ -16,6 +16,11 @@
 
 <!-- Insert new items immediately below here ... -->
 
+<h3>Add osiSockOptMcastLoop_t and osiSockTest</h3>
+
+<p>Added a new OS-independent typedef for multicast socket options, and a test
+file to check their correct operation.<p>
+
 <h3>Support for CONFIG_SITE.local in Base</h3>
 
 <p>This feature is mostly meant for use by developers; configuration