diff --git a/winsup/cygwin/release/2.4.0 b/winsup/cygwin/release/2.4.0
index 9c8144ea3..c22fb5dae 100644
--- a/winsup/cygwin/release/2.4.0
+++ b/winsup/cygwin/release/2.4.0
@@ -22,6 +22,9 @@ What's new:
   who created the file.  This only works for files and directories
   created by Cygwin processes.
 
+- New mount type "usertemp" which allows to mount a POSIX directory to
+  the Windows per-user temporary directory.
+
 - cygpath has a new -U option, which creates cygdrive paths using the
   unambiguous /proc/cygdrive prefix.