diff --git a/include/boost/optional/detail/optional_utility.hpp b/include/boost/optional/detail/optional_utility.hpp
index a5ef508..d17babb 100644
--- a/include/boost/optional/detail/optional_utility.hpp
+++ b/include/boost/optional/detail/optional_utility.hpp
@@ -9,8 +9,8 @@
 // You are welcome to contact the author at:
 //  typenametea@gmail.com
 
-#ifndef BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_UTILITY_HPP
-#define BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_UTILITY_HPP
+#ifndef BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_UTILITY_TNT_05OCT2024_HPP
+#define BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_UTILITY_TNT_05OCT2024_HPP
 
 namespace boost {
 namespace optional_detail {