From 2ed9e9480e1c26680829ccc47b9549f62e56ebf6 Mon Sep 17 00:00:00 2001
From: Feng Lee <feng@emqx.io>
Date: Thu, 19 Sep 2019 11:18:04 +0800
Subject: [PATCH] Remove the default value of 'headers' field

---
 include/emqx.hrl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/emqx.hrl b/include/emqx.hrl
index d676be9cf..ee048f1fa 100644
--- a/include/emqx.hrl
+++ b/include/emqx.hrl
@@ -64,7 +64,7 @@
           %% Message flags
           flags :: #{atom() => boolean()},
           %% Message headers, or MQTT 5.0 Properties
-          headers = #{},
+          headers :: map(),
           %% Topic that the message is published to
           topic :: binary(),
           %% Message Payload