diff --git a/USER_MANUAL.html b/USER_MANUAL.html
index 044f5ff6..3464cb4a 100644
--- a/USER_MANUAL.html
+++ b/USER_MANUAL.html
@@ -1289,6 +1289,11 @@ synchronises. (PR #1482)</li>
 <li>Remove use of mutexes in audio path during callsign decode. (PR
 #1486)</li>
 </ul></li>
+<li>Build system:
+<ul>
+<li>Windows versions are now built with llvm-mingw 20260908 (PR
+#1489)</li>
+</ul></li>
 <li>Other:
 <ul>
 <li>Waterfall and other plot performance improvements. (PR #1481)</li>
diff --git a/USER_MANUAL.pdf b/USER_MANUAL.pdf
index cc6489a1..0b4cffa5 100644
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