diff --git a/minimart/demand-matcher.rkt b/minimart/demand-matcher.rkt
index 6153e20..a0e9c48 100644
--- a/minimart/demand-matcher.rkt
+++ b/minimart/demand-matcher.rkt
@@ -109,8 +109,8 @@
 			      [decrease-handler unexpected-supply-decrease]
 			      #:demand-is-subscription? [demand-is-subscription? #t]
 			      #:meta-level [meta-level 0]
-			      #:demand-level demand-level
-			      #:supply-level supply-level)
+			      #:demand-level [demand-level 0]
+			      #:supply-level [supply-level 0])
   (define d (make-demand-matcher demand-is-subscription?
 				 pattern
 				 meta-level
diff --git a/minimart/examples/ws-hello.rkt b/minimart/examples/ws-hello.rkt
index 491ffbf..9745f71 100644
--- a/minimart/examples/ws-hello.rkt
+++ b/minimart/examples/ws-hello.rkt
@@ -10,8 +10,6 @@
 
 (spawn-demand-matcher (websocket-message any-client server-id ?)
 		      #:demand-is-subscription? #f
-		      #:demand-level 0
-		      #:supply-level 0
 		      (match-lambda ;; arrived-demand-route, i.e. new connection publisher
 		       [(route _ (websocket-message c _ _) _ _)
 			(spawn-connection-handler c)]