diff --git a/include/ircd/m/room.h b/include/ircd/m/room.h
index 0e119acae..1a7db587a 100644
--- a/include/ircd/m/room.h
+++ b/include/ircd/m/room.h
@@ -254,6 +254,8 @@ struct ircd::m::room::state
 	using types = std::function<void (const string_view &)>;
 	using types_bool = std::function<bool (const string_view &)>;
 
+	static conf::item<bool> disable_history;
+
 	room::id room_id;
 	event::id::buf event_id;
 	m::state::id_buffer root_id_buf;
diff --git a/ircd/m/room.cc b/ircd/m/room.cc
index bd03c74b2..25a09b220 100644
--- a/ircd/m/room.cc
+++ b/ircd/m/room.cc
@@ -826,6 +826,17 @@ ircd::m::room::messages::fetch(std::nothrow_t)
 // room::state
 //
 
+decltype(ircd::m::room::state::disable_history)
+ircd::m::room::state::disable_history
+{
+	{ "name",     "ircd.m.room.state.disable_history" },
+	{ "default",  false                               },
+};
+
+//
+// room::state::state
+//
+
 ircd::m::room::state::state(const m::room &room,
                             const event::fetch::opts *const &fopts)
 :room_id
@@ -840,7 +851,7 @@ ircd::m::room::state::state(const m::room &room,
 }
 ,root_id
 {
-	event_id?
+	event_id && !bool(disable_history)?
 		dbs::state_root(root_id_buf, room_id, event_id):
 		m::state::id{}
 }