diff --git a/networks.rkt b/networks.rkt
index 040a6ae..2edb27b 100644
--- a/networks.rkt
+++ b/networks.rkt
@@ -72,14 +72,14 @@
         (hash-set! new-s x (f s))))
     new-s))
 
-;;; A version of make-hash restricted to creating network states (see
-;;; contract).
+;;; A version of make-immutable-hash restricted to creating network
+;;; states (see contract).
 (define (make-state mappings) (make-immutable-hash mappings))
 
 ;;; A shortcut for make-state.
 (define-syntax-rule (st mappings) (make-state mappings))
 
-;;; A version of make-hash restricted to creating networks.
+;;; A version of make-immutable-hash restricted to creating networks.
 (define (make-network-from-functions funcs) (make-immutable-hash funcs))