diff --git a/networks.rkt b/networks.rkt
index 9ba6411..bc0dcd2 100644
--- a/networks.rkt
+++ b/networks.rkt
@@ -51,7 +51,6 @@
                [dds-build-state-graph-annotated (-> dynamics? (set/c state? #:kind 'dont-care) graph?)]
                [dds-build-n-step-state-graph-annotated (-> dynamics? (set/c state? #:kind 'dont-care) number? graph?)]
                [pretty-print-state (-> state? string?)]
-               [any->boolean (-> any/c boolean?)]
                [pretty-print-boolean-state (-> state? string?)]
                [pretty-print-state-graph-with (-> graph? (-> state? string?) graph?)]
                [pretty-print-state-graph (-> graph? graph?)]
@@ -573,9 +572,6 @@
     (check-equal? (pretty-print-state (make-state '((a . #f) (b . 3) (c . 4))))
                   "a:#f b:3 c:4")))
 
-;;; Converts any non-#f value to 1 and #f to 0.
-(define (any->boolean x) (if x 1 0))
-
 ;;; Pretty-prints a state of the network to Boolean values 0 or 1.
 (define (pretty-print-boolean-state s)
   (string-join (hash-map s (λ (key val) (format "~a:~a" key (any->boolean val))) #t)))
diff --git a/utils.rkt b/utils.rkt
index a25ce78..886e26b 100644
--- a/utils.rkt
+++ b/utils.rkt
@@ -48,7 +48,8 @@
                                       (stream/c exact-nonnegative-integer?)))]
                [cartesian-product/stream (->* () #:rest (listof stream?) stream?)]
                [boolean-power (-> number? (listof (listof boolean?)))]
-               [boolean-power/stream (-> number? (stream/c (listof boolean?)))])
+               [boolean-power/stream (-> number? (stream/c (listof boolean?)))]
+               [any->boolean (-> any/c boolean?)])
  ;; Contracts
  (contract-out [variable-mapping? contract?]
                [string-variable-mapping? contract?]
@@ -696,3 +697,11 @@
 (module+ test
   (test-case "boolean-power/stream"
     (check-equal? (stream->list (boolean-power/stream 2)) '((#f #f) (#f #t) (#t #f) (#t #t)))))
+
+;;; Converts any non-#f value to 1 and #f to 0.
+(define (any->boolean x) (if x 1 0))
+
+(module+ test
+  (test-case "any->boolean"
+    (check-equal? (any->boolean #t) 1)
+    (check-equal? (any->boolean #f) 0)))