From 970d243d948f130a9a13554005ce73d39ceab535 Mon Sep 17 00:00:00 2001
From: zhouzb <zhouzb@emqx.io>
Date: Fri, 23 Aug 2019 15:21:20 +0800
Subject: [PATCH] Fix function clause

---
 src/emqx_protocol.erl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/emqx_protocol.erl b/src/emqx_protocol.erl
index 1007db0b5..ef7bbafe2 100644
--- a/src/emqx_protocol.erl
+++ b/src/emqx_protocol.erl
@@ -119,6 +119,8 @@ info(username, #protocol{username = Username}) ->
     Username;
 info(will_msg, #protocol{will_msg = WillMsg}) ->
     WillMsg;
+info(will_delay_interval, #protocol{will_msg = undefined}) ->
+    0;
 info(will_delay_interval, #protocol{will_msg = WillMsg}) ->
     emqx_message:get_header('Will-Delay-Interval', WillMsg, 0);
 info(conn_props, #protocol{conn_props = ConnProps}) ->