diff --git a/include/boost/core/detail/assert.hpp b/include/boost/core/detail/assert.hpp
index a5c2108..daf5c4e 100644
--- a/include/boost/core/detail/assert.hpp
+++ b/include/boost/core/detail/assert.hpp
@@ -5,8 +5,7 @@ Copyright 2025 Glen Joseph Fernandes
 Distributed under the Boost Software License, Version 1.0.
 (http://www.boost.org/LICENSE_1_0.txt)
 */
-#ifndef BOOST_CORE_DETAIL_ASSERT_HPP
-#define BOOST_CORE_DETAIL_ASSERT_HPP
+#undef BOOST_CORE_ASSERT
 
 #include <cassert>
 
@@ -20,5 +19,3 @@ Distributed under the Boost Software License, Version 1.0.
 #else
 #define BOOST_CORE_ASSERT(expr) assert(expr)
 #endif
-
-#endif