diff --git a/examples/netstack/incremental-highlevel/main.rkt b/examples/netstack/incremental-highlevel/main.rkt
index b2d6c0c..37c838d 100644
--- a/examples/netstack/incremental-highlevel/main.rkt
+++ b/examples/netstack/incremental-highlevel/main.rkt
@@ -86,6 +86,6 @@
                            counter)))
                 (send! (outbound (tcp-channel us them response)))
                 (for [(i 4)]
-                  (define buf (make-bytes 1024 (+ #x30 i)))
+                  (define buf (make-bytes 1024 (+ #x30 (modulo i 10))))
                   (send! (outbound (tcp-channel us them buf))))
                 (stop-facet (current-facet-id)))))))