diff --git a/README.md b/README.md
index faa9475..54c16be 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,9 @@ Sometimes complex Racket macros need a way for their syntax to be extended. The
 
 If a user of this macro wished for a way to specify a range of numbers as the arguments, the user must define their own version of call-each with support for ranges that expands to using the original call-each. However, this racket package provides a form, define-syntax-with-expanders:
 
+    (require generic-syntax-expanders
+            (for-syntax racket/list))
+    
     (define-syntax-with-expanders call-each
       (syntax-parser
         [(_ f (expr ...))