diff --git a/ChangeLog b/ChangeLog
index 71754040a9..1a1755e3c9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Dec  9 14:37:51 2015  Shugo Maeda  <shugo@ruby-lang.org>
+
+	* doc/syntax/refinements.rdoc: remove outdated description.
+
 Wed Dec  9 09:58:09 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* ext/**/*.c (*_memsize): same as r52986 for extensions.
diff --git a/doc/syntax/refinements.rdoc b/doc/syntax/refinements.rdoc
index 56fcd7bd1e..968497ccb5 100644
--- a/doc/syntax/refinements.rdoc
+++ b/doc/syntax/refinements.rdoc
@@ -255,12 +255,6 @@ method lookup.
 
 This behavior may be changed in the future.
 
-== Refinements and module inclusion
-
-Refinements are inherited by module inclusion.  That is, using activates all
-refinements in the ancestors of the specified module.  Refinements in a
-descendant have priority over refinements in an ancestor.
-
 == Further Reading
 
 See http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/RefinementsSpec for the