diff --git a/include/ircd/m/dbs.h b/include/ircd/m/dbs.h
index 082dddf87..053d997bb 100644
--- a/include/ircd/m/dbs.h
+++ b/include/ircd/m/dbs.h
@@ -153,6 +153,9 @@ enum class ircd::m::dbs::ref
 
 	// m.relates_to
 	M_RELATES__M_REPLY  = 0x20,
+
+	// m.room.redaction
+	M_ROOM_REDACTION    = 0x40,
 };
 
 /// Database Schema Descriptors
@@ -299,6 +302,7 @@ namespace ircd::m::dbs
 	string_view _index_redact(db::txn &, const event &, const write_opts &);
 	string_view _index_other(db::txn &, const event &, const write_opts &);
 	string_view _index_room(db::txn &, const event &, const write_opts &);
+	void _index_event_refs_m_room_redaction(db::txn &, const event &, const write_opts &);
 	void _index_event_refs_m_receipt_m_read(db::txn &, const event &, const write_opts &);
 	void _index_event_refs_m_relates_m_reply(db::txn &, const event &, const write_opts &);
 	void _index_event_refs_auth(db::txn &, const event &, const write_opts &);
diff --git a/ircd/m_dbs.cc b/ircd/m_dbs.cc
index d7fd1e507..a40ec1c88 100644
--- a/ircd/m_dbs.cc
+++ b/ircd/m_dbs.cc
@@ -360,6 +360,9 @@ ircd::m::dbs::_index_event_refs(db::txn &txn,
 
 	if(opts.event_refs.test(uint(ref::M_RELATES__M_REPLY)))
 		_index_event_refs_m_relates_m_reply(txn, event, opts);
+
+	if(opts.event_refs.test(uint(ref::M_ROOM_REDACTION)))
+		_index_event_refs_m_room_redaction(txn, event, opts);
 }
 
 void
@@ -552,6 +555,48 @@ ircd::m::dbs::_index_event_refs_m_relates_m_reply(db::txn &txn,
 	};
 }
 
+void
+ircd::m::dbs::_index_event_refs_m_room_redaction(db::txn &txn,
+                                                 const event &event,
+                                                 const write_opts &opts)
+{
+	assert(opts.event_refs.test(uint(ref::M_ROOM_REDACTION)));
+
+	if(json::get<"type"_>(event) != "m.room.redaction")
+		return;
+
+	if(!valid(m::id::EVENT, json::get<"redacts"_>(event)))
+		return;
+
+	const auto &event_id
+	{
+		json::get<"redacts"_>(event)
+	};
+
+	const event::idx &event_idx
+	{
+		m::index(event_id, std::nothrow) // query
+	};
+
+	if(!event_idx)
+		return;
+
+	thread_local char buf[EVENT_REFS_KEY_MAX_SIZE];
+	assert(opts.event_idx != 0 && event_idx != 0);
+	const string_view &key
+	{
+		event_refs_key(buf, event_idx, ref::M_ROOM_REDACTION, opts.event_idx)
+	};
+
+	db::txn::append
+	{
+		txn, dbs::event_refs,
+		{
+			opts.op, key, string_view{}
+		}
+	};
+}
+
 ircd::string_view
 ircd::m::dbs::_index_room(db::txn &txn,
                           const event &event,
@@ -1221,6 +1266,9 @@ ircd::m::dbs::reflect(const ref &type)
 
 		case ref::M_RELATES__M_REPLY:
 			return "M_RELATES__M_REPLY";
+
+		case ref::M_ROOM_REDACTION:
+			return "M_ROOM_REDACTION";
 	}
 
 	return "????";