diff --git a/winsup/cygwin/release/3.4.9 b/winsup/cygwin/release/3.4.9
index 53c4e5fc8..e2b064746 100644
--- a/winsup/cygwin/release/3.4.9
+++ b/winsup/cygwin/release/3.4.9
@@ -11,3 +11,6 @@ Bug Fixes
 
 - Fix segfault when too many command line args are specified.
   Addresses: https://cygwin.com/pipermail/cygwin/2023-August/254333.html
+
+- Fix build problems in terms of sys/cpuset.h.
+  Addresses: https://cygwin.com/pipermail/cygwin/2023-August/254283.html