From 465f45a9349fc5713c8566ce8fc0dc8cfd2a5cee Mon Sep 17 00:00:00 2001
From: Mike Brady <mikebrady@eircom.net>
Date: Sat, 24 Jun 2017 18:29:35 +0100
Subject: [PATCH] Update RELEASENOTES.md

---
 RELEASENOTES.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 6bc1883a..8e8dfab0 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -1,3 +1,8 @@
+Version 3.1.d21
+====
+**Bug Fixes**
+* If a fault was detected during initialisation of the ALSA subsystem and Shairport Sync attempted to terminate, sometimes it  hung up waiting indefinitely for a mutex to be unlocked. Unlocking is now done before attempting to terminate. Fixes the issue in #539. Thanks to [f3flight](https://github.com/f3flight) for the report.
+
 Version 3.1.d20
 ====
 **Bug Fix**