diff --git a/USER_MANUAL.html b/USER_MANUAL.html
index da93046f..fa2e6281 100644
--- a/USER_MANUAL.html
+++ b/USER_MANUAL.html
@@ -1284,6 +1284,8 @@ class="citation" data-cites="barjac">@barjac</span>!</li>
 (PR #1480)</li>
 <li>Fix uninitialized value read during waterfall plot render. (PR
 #1481)</li>
+<li>Match std::atomic memory ordering to what each atomic actually
+synchronises. (PR #1482)</li>
 </ul></li>
 <li>Other:
 <ul>
diff --git a/USER_MANUAL.pdf b/USER_MANUAL.pdf
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