diff --git a/doc/book/Quick-Tutorial b/doc/book/Quick-Tutorial
index 083ec7c..d367275 100644
--- a/doc/book/Quick-Tutorial
+++ b/doc/book/Quick-Tutorial
@@ -29,7 +29,7 @@ This yields -1 (`TRUE`) as expected. So we can easily
 name it:
 
 ```
-:palindrome dup s:reverse s:eq? ;
+:palindrome? dup s:reverse s:eq? ;
 ```
 
 Naming uses the `:` prefix to add a new word to the dictionary.