diff --git a/include/ircd/m/rooms.h b/include/ircd/m/rooms.h
index 02a7811e6..58187d8c7 100644
--- a/include/ircd/m/rooms.h
+++ b/include/ircd/m/rooms.h
@@ -32,6 +32,10 @@ namespace ircd::m::rooms::summary
 {
 	struct fetch;
 
+	// util
+	string_view make_state_key(const mutable_buffer &, const room::id &);
+	room::id::buf unmake_state_key(const string_view &);
+
 	// observers
 	bool has(const room::id &);
 	void chunk(const room &, json::stack::object &chunk);
diff --git a/modules/m_rooms.cc b/modules/m_rooms.cc
index b20fc96dd..90390ed33 100644
--- a/modules/m_rooms.cc
+++ b/modules/m_rooms.cc
@@ -169,10 +169,9 @@ ircd::m::rooms::for_each(const opts &opts,
 		const auto proffer_state{[&opts, &proffer, &ret]
 		(const string_view &type, const string_view &state_key, const event::idx &event_idx)
 		{
-			room::id::buf buf;
-			const auto &room_id
+			const auto room_id
 			{
-				room::id::unswap(state_key, buf)
+				rooms::summary::unmake_state_key(state_key)
 			};
 
 			proffer(room_id);
diff --git a/modules/m_rooms_summary.cc b/modules/m_rooms_summary.cc
index ad87cd313..87aea819a 100644
--- a/modules/m_rooms_summary.cc
+++ b/modules/m_rooms_summary.cc
@@ -10,8 +10,6 @@
 
 namespace ircd::m::rooms::summary
 {
-	static string_view make_state_key(const mutable_buffer &out, const m::room::id &);
-	static room::id::buf unmake_state_key(const string_view &);
 	static void chunk_remote(const room &, json::stack::object &o);
 	static void chunk_local(const room &, json::stack::object &o);
 
@@ -407,6 +405,7 @@ ircd::m::rooms::summary::has(const room::id &room_id)
 }
 
 ircd::m::room::id::buf
+IRCD_MODULE_EXPORT
 ircd::m::rooms::summary::unmake_state_key(const string_view &key)
 {
 	m::room::id::buf ret;
@@ -414,6 +413,7 @@ ircd::m::rooms::summary::unmake_state_key(const string_view &key)
 }
 
 ircd::string_view
+IRCD_MODULE_EXPORT
 ircd::m::rooms::summary::make_state_key(const mutable_buffer &buf,
                                         const m::room::id &room_id)
 {