diff --git a/aeron-driver/src/main/java/io/aeron/driver/NetworkPublication.java b/aeron-driver/src/main/java/io/aeron/driver/NetworkPublication.java
index <HASH>..<HASH> 100644
--- a/aeron-driver/src/main/java/io/aeron/driver/NetworkPublication.java
+++ b/aeron-driver/src/main/java/io/aeron/driver/NetworkPublication.java
@@ -769,6 +769,7 @@ public class NetworkPublication
 
     long consumerPosition()
     {
+        // TODO: Handle case of spies being the only consumer.
         return senderPosition.getVolatile();
     }
 }
[Java] Added TODO.