diff --git a/src/detail/ca-storage.hpp b/src/detail/ca-storage.hpp
index b5c2ce7..7349300 100644
--- a/src/detail/ca-storage.hpp
+++ b/src/detail/ca-storage.hpp
@@ -18,8 +18,8 @@
  * See AUTHORS.md for complete list of ndncert authors and contributors.
  */
 
-#ifndef NDNCERT_CA_STORAGE_HPP
-#define NDNCERT_CA_STORAGE_HPP
+#ifndef NDNCERT_DETAIL_CA_STORAGE_HPP
+#define NDNCERT_DETAIL_CA_STORAGE_HPP
 
 #include "detail/ca-state.hpp"
 
@@ -92,4 +92,4 @@
 } // namespace ndncert
 } // namespace ndn
 
-#endif // NDNCERT_CA_STORAGE_HPP
+#endif // NDNCERT_DETAIL_CA_STORAGE_HPP