diff --git a/ChangeLog b/ChangeLog
index 748f8b9875..908a47d2fd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Nov 21 00:36:09 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* ext/openssl/lib/openssl/x509.rb
+	  (OpenSSL::X509::Name::RFC2253DN::StringChar): get rid of a false
+	  positive assertion in ripper's test.
+
 Fri Nov 21 00:29:51 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* lib/net/imap.rb (Net::IMAP::ResponseParser::BEG_REGEXP): no need to
diff --git a/ext/openssl/lib/openssl/x509.rb b/ext/openssl/lib/openssl/x509.rb
index 10a088944b..38b65c71cf 100644
--- a/ext/openssl/lib/openssl/x509.rb
+++ b/ext/openssl/lib/openssl/x509.rb
@@ -70,7 +70,7 @@ module OpenSSL
         HexPair = /#{HexChar}#{HexChar}/
         HexString = /#{HexPair}+/
         Pair = /\\(?:[#{Special}]|\\|"|#{HexPair})/
-        StringChar = /[^#{Special}\\"]/
+        StringChar = /[^\\"#{Special}]/
         QuoteChar = /[^\\"]/
         AttributeType = /[a-zA-Z][0-9a-zA-Z]*|[0-9]+(?:\.[0-9]+)*/
         AttributeValue = /