diff --git a/back/src/Model/Websocket/ExtRooms.ts b/back/src/Model/Websocket/ExtRooms.ts
index f0eadea6..7fb6216d 100644
--- a/back/src/Model/Websocket/ExtRooms.ts
+++ b/back/src/Model/Websocket/ExtRooms.ts
@@ -8,7 +8,7 @@ export class ExtRooms implements ExtRoomsInterface{
     Worlds: any;
 
     [room: string]: SocketIO.Room;
-};
+}
 
 let RefreshUserPositionFunction = function(rooms : ExtRooms, Io: socketIO.Server) {
     let clients = Io.clients();