diff --git a/src/security/v2/validation-state.hpp b/src/security/v2/validation-state.hpp
index 2181fae..821b85c 100644
--- a/src/security/v2/validation-state.hpp
+++ b/src/security/v2/validation-state.hpp
@@ -25,6 +25,7 @@
 #include "../../tag-host.hpp"
 #include "validation-callback.hpp"
 #include "certificate.hpp"
+#include "../../util/signal.hpp"
 
 #include <unordered_set>
 #include <list>
@@ -223,6 +224,9 @@
   const Interest&
   getOriginalInterest() const;
 
+public:
+  util::Signal<InterestValidationState, Interest> afterSuccess;
+
 private:
   void
   verifyOriginalPacket(const Certificate& trustedCert) final;