diff --git a/etc/emqx.conf b/etc/emqx.conf
index d5490d954..d41d604c3 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -570,11 +570,6 @@ mqtt.strict_mode = false
 ## Value: duration
 zone.external.idle_timeout = 15s
 
-## Hibernate after a duration of idle state.
-##
-## Value: duration
-zone.external.hibernate_after = 60s
-
 ## Publish limit for the external MQTT connections.
 ##
 ## Value: Number,Duration
diff --git a/priv/emqx.schema b/priv/emqx.schema
index a7f53ba1f..468dfc343 100644
--- a/priv/emqx.schema
+++ b/priv/emqx.schema
@@ -735,12 +735,6 @@ end}.
   {datatype, {duration, ms}}
 ]}.
 
-%% @doc Hibernate after a duration of idle state.
-{mapping, "zone.$name.hibernate_after", "emqx.zones", [
-  {default, "60s"},
-  {datatype, {duration, ms}}
-]}.
-
 {mapping, "zone.$name.allow_anonymous", "emqx.zones", [
   {datatype, {enum, [true, false]}}
 ]}.