diff --git a/echo-client.rkt b/echo-client.rkt
index dbc06ca..689cffc 100644
--- a/echo-client.rkt
+++ b/echo-client.rkt
@@ -169,4 +169,5 @@
   (write-logbook-datum! Tsummary #:label "ping-time" ping-time)
   (write-logbook-datum! Tsummary #:label "max-waypoint" max-waypoint)
   (write-logbook-datum! Tsummary #:label "waypoints" waypoints)
+  (printf "echo-client finished.\n")
   (void))