From 136bf13a3615988413f2600bb6a03a651c70893e Mon Sep 17 00:00:00 2001
From: Mike Brady <4265913+mikebrady@users.noreply.github.com>
Date: Wed, 23 Jun 2021 20:01:03 +0100
Subject: [PATCH] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 54f9672a..d1031647 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ More About What Works
 What You Need
 ---
 * A Raspberry Pi 3 or better is needed. At present, Shairport Sync will not run successfully on an original Pi or a Pi Zero.
-* [`NQPTP`](https://github.com/mikebrady/nqptp) is needed and must be run as `root`. It will use ports `319` and `320`, normally reserved for PTP clocks. If you are using PTP clock services for something else, you can't install [`NQPTP`](https://github.com/mikebrady/nqptp) and so you can't use Shairport Sync.
+* [`NQPTP`](https://github.com/mikebrady/nqptp) is needed and must be run as `root`. It will use ports `319` and `320`, normally reserved for [PTP](https://standards.ieee.org/standard/1588-2008.html) clocks. If you are using PTP clock services for something else, you can't install [`NQPTP`](https://github.com/mikebrady/nqptp) and so you can't use Shairport Sync.
 
 Guides
 ---