diff --git a/src/osdc/Objecter.h b/src/osdc/Objecter.h
index bc0ecb5658bbd..ef620ee94b830 100644
--- a/src/osdc/Objecter.h
+++ b/src/osdc/Objecter.h
@@ -1249,7 +1249,7 @@ class Objecter : public md_config_obs_t, public Dispatcher {
   version_t last_seen_pgmap_version;
 
   mutable boost::shared_mutex rwlock;
-  using lock_guard = std::unique_lock<decltype(rwlock)>;
+  using lock_guard = std::lock_guard<decltype(rwlock)>;
   using unique_lock = std::unique_lock<decltype(rwlock)>;
   using shared_lock = boost::shared_lock<decltype(rwlock)>;
   using shunique_lock = ceph::shunique_lock<decltype(rwlock)>;