diff --git a/USER_MANUAL.html b/USER_MANUAL.html
index de5aaac0..faf2fcf6 100644
--- a/USER_MANUAL.html
+++ b/USER_MANUAL.html
@@ -527,6 +527,7 @@ FMA             -       Supports FMA extensions using YMM state</code></pre>
 <li>Resolves crash when using click to tune feature on main window. (PR #157)</li>
 <li>Resolves issue where test plots inside Audio Options dialog hang during test. (PR #154)</li>
 <li>Disable multi-RX options in Tools-&gt;Options when a session is active. (PR #154)</li>
+<li>Resolves buffer overflow when using mono-only TX sound devices. (PR #169)</li>
 </ul></li>
 <li>Enhancements:
 <ul>
diff --git a/USER_MANUAL.pdf b/USER_MANUAL.pdf
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