diff --git a/Vostok.ZooKeeper.Client/ZooKeeperClient.cs b/Vostok.ZooKeeper.Client/ZooKeeperClient.cs
index da166b4..722ec7c 100644
--- a/Vostok.ZooKeeper.Client/ZooKeeperClient.cs
+++ b/Vostok.ZooKeeper.Client/ZooKeeperClient.cs
@@ -192,7 +192,7 @@ private async Task<TResult> ExecuteOperation<TRequest, TResult>(BaseOperation<TR
             try
             {
                 var client = await clientHolder.GetConnectedClient().ConfigureAwait(false);
-                span.SetReplica(client.GetReplica() ?? "not-connected");
+                span.SetReplica(client?.GetReplica() ?? "not-connected");
 
                 if (client == null)
                     result = operation.CreateUnsuccessfulResult(