diff --git a/include/boost/config/stdlib/libstdcpp3.hpp b/include/boost/config/stdlib/libstdcpp3.hpp
index f4a89862..b26d1ff9 100644
--- a/include/boost/config/stdlib/libstdcpp3.hpp
+++ b/include/boost/config/stdlib/libstdcpp3.hpp
@@ -127,15 +127,15 @@
 #  define BOOST_LIBSTDCXX_VERSION 40900
 #elif __has_include(<ext/cmath>)
 #  define BOOST_LIBSTDCXX_VERSION 40800
-#elif __has_include(chrono)
+#elif __has_include(<chrono>)
 #  define BOOST_LIBSTDCXX_VERSION 40700
-#elif __has_include(typeindex)
+#elif __has_include(<typeindex>)
 #  define BOOST_LIBSTDCXX_VERSION 40600
-#elif __has_include(future)
+#elif __has_include(<future>)
 #  define BOOST_LIBSTDCXX_VERSION 40500
-#elif  __has_include(ratio)
+#elif  __has_include(<ratio>)
 #  define BOOST_LIBSTDCXX_VERSION 40400
-#elif __has_include(array)
+#elif __has_include(<array>)
 #  define BOOST_LIBSTDCXX_VERSION 40300
 #endif
 //