diff --git a/src/Messaging/NBB.Messaging.Rusi/RusiMessagingTransport.cs b/src/Messaging/NBB.Messaging.Rusi/RusiMessagingTransport.cs
index 4041f9a5..05a13fec 100644
--- a/src/Messaging/NBB.Messaging.Rusi/RusiMessagingTransport.cs
+++ b/src/Messaging/NBB.Messaging.Rusi/RusiMessagingTransport.cs
@@ -76,7 +76,7 @@ public async Task<IDisposable> SubscribeAsync(string topic, Func<TransportReceiv
 
             var subRequest = new SubscriptionRequest()
             {
-                PubsubName = _options.Value.PubsubName,
+                PubsubName = _options.Value.PubsubName ?? string.Empty,
                 Topic = topic,
                 Options = subscriptionOptions
             };