diff --git a/src/detail/probe-encoder.hpp b/src/detail/probe-encoder.hpp
index df8dfec..f75e892 100644
--- a/src/detail/probe-encoder.hpp
+++ b/src/detail/probe-encoder.hpp
@@ -18,8 +18,8 @@
  * See AUTHORS.md for complete list of ndncert authors and contributors.
  */
 
-#ifndef NDNCERT_PROTOCOL_DETAIL_PROBE_ENCODER_HPP
-#define NDNCERT_PROTOCOL_DETAIL_PROBE_ENCODER_HPP
+#ifndef NDNCERT_DETAIL_PROBE_ENCODER_HPP
+#define NDNCERT_DETAIL_PROBE_ENCODER_HPP
 
 #include "configuration.hpp"
 
@@ -50,4 +50,4 @@
 } // namespace ndncert
 } // namespace ndn
 
-#endif // NDNCERT_PROTOCOL_DETAIL_PROBE_ENCODER_HPP
\ No newline at end of file
+#endif // NDNCERT_DETAIL_PROBE_ENCODER_HPP
\ No newline at end of file