diff --git a/etcd/Client.hpp b/etcd/Client.hpp
index 6bc7d77..429f579 100644
--- a/etcd/Client.hpp
+++ b/etcd/Client.hpp
@@ -271,6 +271,7 @@ namespace etcd
     std::mutex mutex_for_keepalives;
     std::map<std::string, int64_t> leases_for_locks;
     std::map<int64_t, std::shared_ptr<KeepAlive>> keep_alive_for_locks;
+    long timeout;
 
     friend class KeepAlive;
     friend class Watcher;