diff --git a/ChangeLog b/ChangeLog
index 02a8aab7c8..0751cc2eee 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Feb 26 12:25:56 2016  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* doc/extension.ja.rdoc: removed rendering error caused by editor specific
+	  configuration on http://docs.ruby-lang.org/en/trunk/extension_rdoc.html .
+	  [Bug #12111][ruby-core:73990]
+
 Fri Feb 26 11:21:41 2016  herwinw  <herwin@quarantainenet.nl>
 
 	* lib/xmlrpc.rb: Removed references to NQXML. It's obsoleted parser.
diff --git a/doc/extension.ja.rdoc b/doc/extension.ja.rdoc
index a964a466dc..019bba3d8f 100644
--- a/doc/extension.ja.rdoc
+++ b/doc/extension.ja.rdoc
@@ -1788,9 +1788,3 @@ rb_ary_store() などの，適切な API 関数を利用するようにして下
 
 そのほか，対応についての詳細は README.EXT の「Appendix D. Generational
 GC」を参照して下さい．
-
-/*
- * Local variables:
- * fill-column: 60
- * end:
- */
diff --git a/doc/extension.rdoc b/doc/extension.rdoc
index 33fd6660b3..48bb08661b 100644
--- a/doc/extension.rdoc
+++ b/doc/extension.rdoc
@@ -1821,9 +1821,3 @@ keyword in C.  RB_GC_GUARD has the following advantages:
    compilers and architectures. RB_GC_GUARD is customizable for broken
    systems/compilers without those without negatively affecting other
    systems.
-
-/*
- * Local variables:
- * fill-column: 70
- * end:
- */