diff --git a/include/boost/geometry/algorithms/area_result.hpp b/include/boost/geometry/algorithms/area_result.hpp
index e54f7c1df..19b3fd3d6 100644
--- a/include/boost/geometry/algorithms/area_result.hpp
+++ b/include/boost/geometry/algorithms/area_result.hpp
@@ -10,8 +10,8 @@
 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_GEOMETRY_STRATEGY_AREA_RESULT_HPP
-#define BOOST_GEOMETRY_STRATEGY_AREA_RESULT_HPP
+#ifndef BOOST_GEOMETRY_ALGORITHMS_AREA_RESULT_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_AREA_RESULT_HPP
 
 
 #include <type_traits>
@@ -177,4 +177,4 @@ struct area_result<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>, default_strateg
 }} // namespace boost::geometry
 
 
-#endif // BOOST_GEOMETRY_STRATEGY_AREA_RESULT_HPP
+#endif // BOOST_GEOMETRY_ALGORITHMS_AREA_RESULT_HPP
diff --git a/include/boost/geometry/algorithms/default_area_result.hpp b/include/boost/geometry/algorithms/default_area_result.hpp
index c3accb85f..071355a47 100644
--- a/include/boost/geometry/algorithms/default_area_result.hpp
+++ b/include/boost/geometry/algorithms/default_area_result.hpp
@@ -12,8 +12,8 @@
 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_GEOMETRY_STRATEGY_DEFAULT_AREA_RESULT_HPP
-#define BOOST_GEOMETRY_STRATEGY_DEFAULT_AREA_RESULT_HPP
+#ifndef BOOST_GEOMETRY_ALGORITHMS_DEFAULT_AREA_RESULT_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DEFAULT_AREA_RESULT_HPP
 
 
 #include <boost/geometry/algorithms/area_result.hpp>
@@ -38,4 +38,4 @@ struct default_area_result
 }} // namespace boost::geometry
 
 
-#endif // BOOST_GEOMETRY_STRATEGY_DEFAULT_AREA_RESULT_HPP
+#endif // BOOST_GEOMETRY_ALGORITHMS_DEFAULT_AREA_RESULT_HPP