diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
index b15e347ef..488506390 100644
--- a/documentation/RELEASE_NOTES.html
+++ b/documentation/RELEASE_NOTES.html
@@ -18,6 +18,12 @@
 <h2>Changes since 3.14.2</h2>
 </center>
 
+<h4>TPRO output</h4>
+
+<p>The record processing trace output generated when the <code>.TPRO</code>
+field of a record is non-zero now includes the name of the thread that is
+actually doing the processing.</p>
+
 <h4>calcRecord and calcoutRecord</h4>
 
 <p>Previously if a dbGetLink failed on one of the input links, dbGetLink was