diff --git a/README.org b/README.org
index ac7aa30..ea3e19b 100644
--- a/README.org
+++ b/README.org
@@ -12,7 +12,7 @@ When parsing and building TOML documents, guile-toml follows [[https://github.co
 
 | TOML           | Guile            |
 |----------------+------------------|
-| string         | string           |
+| string         | string [0]        |
 | key-value pair | alist            |
 | array          | vector           |
 | integer/float  | real             |
@@ -24,6 +24,8 @@ When parsing and building TOML documents, guile-toml follows [[https://github.co
 
 To start using guile-toml: ~(use-modules (toml))~
 
+[0]: TOML's default behaviour for invalid UTF-8 is to fail, whereas [[https://www.gnu.org/software/guile/manual/html_node/Encoding.html][Guile's default behavior]] is to replace invalid UTF-8 with �. If you prefer TOML's behavior, use ~(set-port-conversion-strategy! (current-input-port) 'error)~.
+
 [1]: TOML's ~time-local~ is parsed same as a ~datetime-local~ on the date of ~1970-01-01~.
 
 *** Reading TOML documents