From b612674ffa5ceb785b40ae3bc9037e8a6215563a Mon Sep 17 00:00:00 2001
From: turtleDeng <turtled@emqtt.io>
Date: Sat, 21 Dec 2019 14:16:37 +0800
Subject: [PATCH] Update emqx_mqtt_caps.erl

---
 src/emqx_mqtt_caps.erl | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/emqx_mqtt_caps.erl b/src/emqx_mqtt_caps.erl
index 2844e4fe7..f24d074d5 100644
--- a/src/emqx_mqtt_caps.erl
+++ b/src/emqx_mqtt_caps.erl
@@ -118,8 +118,7 @@ do_check_sub(_Flags, _Caps) -> ok.
 
 -spec(get_caps(emqx_zone:zone()) -> caps()).
 get_caps(Zone) ->
-    maps:from_list([{Cap, emqx_zone:get_env(Zone, Cap, Def)} ||
-        {Cap, Def} <- maps:to_list(?DEFAULT_CAPS)]).
+    maps:map(fun(Cap, Def) -> emqx_zone:get_env(Zone, Cap, Def) end, ?DEFAULT_CAPS).
 
 -spec(get_caps(emqx_zone:zone(), publish|subscribe) -> caps()).
 get_caps(Zone, publish) ->