diff --git a/utils.rkt b/utils.rkt
index bf49462..1fbe20d 100644
--- a/utils.rkt
+++ b/utils.rkt
@@ -502,9 +502,9 @@
     (check-equal? (pretty-print-set (set 'a 'b 1)) "1 a b")))
 
 
-;;; =========================
-;;; Additional list utilities
-;;; =========================
+;;; ======================================
+;;; Additional list and hash map utilities
+;;; ======================================
 
 ;;; Collects labels for duplicate edges into a sets of labels.
 ;;;