diff --git a/ChangeLog b/ChangeLog
index dfed835c77..dcb5c56f15 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Oct  3 21:24:41 2016  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* NEWS: mention Readline.quoting_detection_proc{,=}.
+
 Mon Oct  3 21:19:46 2016  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
 
 	* lib/logger.rb: [DOC] Fix default value of shift_age.
diff --git a/NEWS b/NEWS
index 0c85728b1d..ed373f3b34 100644
--- a/NEWS
+++ b/NEWS
@@ -146,6 +146,10 @@ with all sufficient information, see the ChangeLog file or Redmine
     https://github.com/ruby/openssl. OpenSSL still remains as a default gem.
     Refer to its History.md for the full release note. [Feature #9612]
 
+* Readline
+  * Readline.quoting_detection_proc and Readline.quoting_detection_proc=
+    [Feature #12659]
+
 * optparse
 
   * Add an into option. [Feature #11191]