diff --git a/module/language/tree-il/fix-letrec.scm b/module/language/tree-il/fix-letrec.scm
index 3fbe8c093..8d4b2391b 100644
--- a/module/language/tree-il/fix-letrec.scm
+++ b/module/language/tree-il/fix-letrec.scm
@@ -25,7 +25,7 @@
   #:export (fix-letrec!))
 
 ;; For a detailed discussion, see "Fixing Letrec: A Faithful Yet
-;; Efficient Implementation of Scheme’s Recursive Binding Construct", by
+;; Efficient Implementation of Scheme's Recursive Binding Construct", by
 ;; Oscar Waddell, Dipanwita Sarkar, and R. Kent Dybvig.
 
 (define fix-fold