1 files changed, 2 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/message_verifier.rb b/activesupport/lib/active_support/message_verifier.rb
index 304058253c..b24acb9f47 100644
--- a/activesupport/lib/active_support/message_verifier.rb
+++ b/activesupport/lib/active_support/message_verifier.rb
@@ -39,7 +39,8 @@ module ActiveSupport
     
     private
       def generate_digest(data)
+        require 'openssl' unless defined?(OpenSSL)
         OpenSSL::HMAC.hexdigest(OpenSSL::Digest::Digest.new(@digest), @secret, data)
       end
   end
-end
-\ No newline at end of file
+end