diff --git a/lib/jopenssl/load.rb b/lib/jopenssl/load.rb
index db90cdf4..ab224c27 100644
--- a/lib/jopenssl/load.rb
+++ b/lib/jopenssl/load.rb
@@ -43,6 +43,7 @@
 
 module OpenSSL
   autoload :Config, 'openssl/config' unless const_defined?(:Config, false)
+  autoload :ConfigError, 'openssl/config' unless const_defined?(:ConfigError, false)
   autoload :PKCS12, 'openssl/pkcs12'
 end
 
diff --git a/lib/openssl/config.rb b/lib/openssl/config.rb
index 9a0b7874..547b08f2 100644
--- a/lib/openssl/config.rb
+++ b/lib/openssl/config.rb
@@ -14,6 +14,7 @@
 require 'stringio'
 
 module OpenSSL
+  class ConfigError < OpenSSLError; end
   ##
   # = OpenSSL::Config
   #
@@ -27,6 +28,8 @@ module OpenSSL
   class Config
     include Enumerable
 
+    DEFAULT_CONFIG_FILE = nil # JRuby: compatibility (we do not read openssl.cnf)
+
     class << self
 
       ##