diff --git a/src/security/signature-sha256-with-rsa.hpp b/src/security/signature-sha256-with-rsa.hpp
index cfcef90..b1dd6e1 100644
--- a/src/security/signature-sha256-with-rsa.hpp
+++ b/src/security/signature-sha256-with-rsa.hpp
@@ -9,6 +9,7 @@
 #define NDN_SIGNATURE_SHA256_WITH_RSA_HPP
 
 #include "../data.hpp"
+#include "../encoding/tlv.hpp"
 
 namespace ndn {