diff --git a/src/protocol-detail/crypto-helper.hpp b/src/protocol-detail/crypto-helper.hpp
index baa2e66..a590bfa 100644
--- a/src/protocol-detail/crypto-helper.hpp
+++ b/src/protocol-detail/crypto-helper.hpp
@@ -21,7 +21,7 @@
 #ifndef NDNCERT_CRYPTO_SUPPORT_CRYPTO_HELPER_HPP
 #define NDNCERT_CRYPTO_SUPPORT_CRYPTO_HELPER_HPP
 
-#include "../ndncert-common.hpp"
+#include "ndncert-common.hpp"
 
 namespace ndn {
 namespace ndncert {