diff --git a/os2-dns.rkt b/os2-dns.rkt
index f332842..b3975ec 100644
--- a/os2-dns.rkt
+++ b/os2-dns.rkt
@@ -52,7 +52,7 @@
 
 (define dns-spy
   (transition 'none
-    (role 'spy (topic-subscriber (wild) #:virtual? #t)
+    (role 'spy (topic-subscriber (wild) #:monitor? #t)
       #:state w
       [(dns-request message source sink)
        (log-info (format "DNS: ~v asks ~v ~v~n   : ~v"