diff --git a/include/mod_muc_room.hrl b/include/mod_muc_room.hrl
index 6f170269d..5fabbb9e8 100644
--- a/include/mod_muc_room.hrl
+++ b/include/mod_muc_room.hrl
@@ -110,8 +110,8 @@
 
 -record(muc_online_users, {us = {<<>>, <<>>} :: {binary(), binary()},
                            resource = <<>> :: binary() | '_',
-                           room = <<>> :: binary() | '_',
-                           host = <<>> :: binary() | '_'}).
+                           room = <<>> :: binary() | '_' | '$1',
+                           host = <<>> :: binary() | '_' | '$2'}).
 
 -type muc_online_users() :: #muc_online_users{}.