2 files changed, 9 insertions, 5 deletions
diff --git a/plugins/muc/mod_muc.lua b/plugins/muc/mod_muc.lua
index 871b90b4..354ab1d1 100644
--- a/plugins/muc/mod_muc.lua
+++ b/plugins/muc/mod_muc.lua
@@ -102,11 +102,7 @@ local function room_save(room, forced)
 	local is_persistent = persistent.get(room);
 	persistent_rooms:set(nil, room.jid, is_persistent);
 	if is_persistent then
-		local data = {
-			jid = room.jid;
-			_data = room._data;
-			_affiliations = room._affiliations;
-		};
+		local data = room:freeze();
 		room_configs:set(node, data);
 	elseif forced then
 		room_configs:set(node, nil);
diff --git a/plugins/muc/muc.lib.lua b/plugins/muc/muc.lib.lua
index 42a0af25..2026bc47 100644
--- a/plugins/muc/muc.lib.lua
+++ b/plugins/muc/muc.lib.lua
@@ -1235,6 +1235,14 @@ function _M.new_room(jid, config) -- luacheck: ignore 212
 	}, room_mt);
 end
 
+function room_mt:freeze()
+	return {
+		jid = self.jid;
+		_data = self._data;
+		_affiliations = self._affiliations;
+	}
+end
+
 _M.room_mt = room_mt;
 
 return _M;