diff --git a/README.org b/README.org
index 269115b..db2cfda 100644
--- a/README.org
+++ b/README.org
@@ -3077,7 +3077,7 @@ Return a list of items where the filename is the `car' of each item and the
                  result)))))
     result))
 
-(mapcar #'list (cl-sort (org-babel-active-languages) #'string<))
+(mapcar #'list (cl-sort (org-babel-active-languages) #'string-lessp))
 #+end_src
 
 #+caption[Active Org Babel languages]: