diff --git a/ChangeLog b/ChangeLog
index ede8c382f5..dff430c904 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Nov  9 08:58:05 2014  Tanaka Akira  <akr@fsij.org>
+
+	* defs/known_errors.def (EHWPOISON): New errno symbol.
+	  It is defined by glibc-2.16.
+
 Sun Nov  9 05:00:23 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* lib/securerandom.rb (initialize): call the special method for Win32
diff --git a/defs/known_errors.def b/defs/known_errors.def
index 3cebe90a8e..33b83b05f4 100644
--- a/defs/known_errors.def
+++ b/defs/known_errors.def
@@ -143,3 +143,4 @@ EPROGMISMATCH
 EPROGUNAVAIL
 ERPCMISMATCH
 EIPSEC
+EHWPOISON