diff --git a/src/client/cluster_client.h b/src/client/cluster_client.h
index cb7ef496..a80f60c2 100644
--- a/src/client/cluster_client.h
+++ b/src/client/cluster_client.h
@@ -86,8 +86,8 @@ class cluster_client_t
 #ifdef __MOCK__
 public:
 #endif
-    timerfd_manager_t *tfd;
-    ring_loop_t *ringloop;
+    timerfd_manager_t *tfd = NULL;
+    ring_loop_t *ringloop = NULL;
 
     std::map<pool_id_t, uint64_t> pg_counts;
     std::map<pool_pg_num_t, osd_num_t> pg_primary;
diff --git a/src/kv/kv_db.cpp b/src/kv/kv_db.cpp
index 8583ec10..2343a3aa 100644
--- a/src/kv/kv_db.cpp
+++ b/src/kv/kv_db.cpp
@@ -870,7 +870,7 @@ static void get_block(kv_db_t *db, uint64_t offset, int cur_level, int recheck_p
         }
         // Block already in cache, we can proceed
         blk->usage = db->usage_counter;
-        cb(0, BLK_UPDATING);
+        db->cli->msgr.ringloop->set_immediate([=] { cb(0, BLK_UPDATING); });
         return;
     }
     cluster_op_t *op = new cluster_op_t;