diff --git a/networks.rkt b/networks.rkt
index 6504632..c62031d 100644
--- a/networks.rkt
+++ b/networks.rkt
@@ -175,8 +175,7 @@
 ;;; multiple different ways.
 (define network? (hash/c variable? procedure?))
 
-;;; Given a state s updates all the variables from xs.  This
-;;; corresponds to a parallel mode.
+;;; Given a state s updates all the variables from xs.
 (define (update network s xs)
   (for/fold ([new-s s])
             ([x xs])