diff --git a/src/configuration.hpp b/src/configuration.hpp
index e1706e7..892c056 100644
--- a/src/configuration.hpp
+++ b/src/configuration.hpp
@@ -136,8 +136,7 @@
    * Used for CA redirection as specified in
    * https://github.com/named-data/ndncert/wiki/NDNCERT-Protocol-0.3-PROBE-Extensions#probe-extension-for-redirection
    */
-  using RedirectionItems = std::vector<std::tuple<Name, std::shared_ptr<security::v2::Certificate>>>;
-  boost::optional<RedirectionItems> m_redirection;
+  boost::optional<std::vector<std::shared_ptr<security::v2::Certificate>>> m_redirection;
   /**
    * NameAssignmentFunc Callback function
    */