diff --git a/example/markdown-to-xhtml.retro b/example/markdown-to-xhtml.retro
index 7f24e89..6a57856 100755
--- a/example/markdown-to-xhtml.retro
+++ b/example/markdown-to-xhtml.retro
@@ -281,7 +281,7 @@ headers should look like:
   over '####_ s:begins-with? or ;
 
 :format:head
-  ASCII:SPACE s:split
+  ASCII:SPACE s:split/char
   '#   [ '<span_class="h1"> s:put n:inc s:put '</span> s:put nl ] s:case
   '##  [ '<span_class="h2"> s:put n:inc s:put '</span> s:put nl ] s:case
   '### [ '<span_class="h3"> s:put n:inc s:put '</span> s:put nl ] s:case
diff --git a/example/markdown.retro b/example/markdown.retro
index f25ec38..bfd5a65 100644
--- a/example/markdown.retro
+++ b/example/markdown.retro
@@ -107,7 +107,7 @@ headers should look like:
       [ '### s:begins-with? ] tri or or ;
 
 :format:head
-  ASCII:SPACE s:split
+  ASCII:SPACE s:split/char
   '#   [ '<h1> s:put n:inc s:put '</h1> s:put nl ] s:case
   '##  [ '<h2> s:put n:inc s:put '</h2> s:put nl ] s:case
   '### [ '<h3> s:put n:inc s:put '</h3> s:put nl ] s:case