From e8d87969884f5f7c84fdc2a7ce05014de55b5a7f Mon Sep 17 00:00:00 2001
From: cremno <cremno@mail.ru>
Date: Tue, 17 Nov 2015 00:44:07 +0100
Subject: document MRB_UTF8_STRING config macro

---
 doc/guides/mrbconf.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doc/guides/mrbconf.md b/doc/guides/mrbconf.md
index 8a5ea4d87..fabd7208b 100644
--- a/doc/guides/mrbconf.md
+++ b/doc/guides/mrbconf.md
@@ -138,6 +138,10 @@ largest value of required alignment.
 * Ignored when `MRB_USE_IV_SEGLIST` is defined.
 
 ## Other configuration.
+`MRB_UTF8_STRING`
+* Adds UTF-8 encoding support to character-oriented String instance methods.
+* If it isn't defined, they only support the US-ASCII encoding.
+
 `MRB_FUNCALL_ARGC_MAX`
 * Default value is `16`.
 * Specifies 4th argument(`argc`) max value of `mrb_funcall`.
-- 
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