From fa9fece76a2cadf2b015459dc78c633d0658d559 Mon Sep 17 00:00:00 2001
From: "Roger A. Light" <roger@atchoo.org>
Date: Wed, 9 Jul 2014 20:42:39 +0100
Subject: [PATCH] Doc addition.

---
 lib/mosquitto.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/mosquitto.h b/lib/mosquitto.h
index 4f732805aa..6c78d7c0d1 100644
--- a/lib/mosquitto.h
+++ b/lib/mosquitto.h
@@ -99,6 +99,11 @@ struct mosquitto;
  * Topic: Threads
  *	libmosquitto provides thread safe operation, with the exception of
  *	<mosquitto_lib_init> which is not thread safe.
+ *
+ *	If your application uses threads you must use <mosquitto_threaded_set> to
+ *	tell the library this is the case, otherwise it makes some optimisations
+ *	for the single threaded case that may result in unexpected behaviour for
+ *	the multi threaded case.
  */
 /***************************************************
  * Important note