diff --git a/src/configuration.hpp b/src/configuration.hpp
index 7f4f8a4..e1706e7 100644
--- a/src/configuration.hpp
+++ b/src/configuration.hpp
@@ -131,11 +131,14 @@
   void
   load(const std::string& fileName);
 
-  void
-  save(const std::string& fileName) const;
-
   CaConfigItem m_caItem;
   /**
+   * 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;
+  /**
    * NameAssignmentFunc Callback function
    */
   NameAssignmentFunc m_nameAssignmentFunc;