diff --git a/include/boost/config/stdlib/libstdcpp3.hpp b/include/boost/config/stdlib/libstdcpp3.hpp
index 6ef99048..d4596498 100644
--- a/include/boost/config/stdlib/libstdcpp3.hpp
+++ b/include/boost/config/stdlib/libstdcpp3.hpp
@@ -123,7 +123,7 @@
 //
 #ifdef __clang__
 
-#if __has_include(<experimental/filesystem>)
+#if __has_include(<experimental/memory_resource>)
 #  define BOOST_LIBSTDCXX_VERSION 60100
 #elif __has_include(<experimental/any>)
 #  define BOOST_LIBSTDCXX_VERSION 50100