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-rw-r--r--libcxx/include/chrono2
1 files changed, 2 insertions, 0 deletions
diff --git a/libcxx/include/chrono b/libcxx/include/chrono
index a5bb9afa8b2..cabf18c038c 100644
--- a/libcxx/include/chrono
+++ b/libcxx/include/chrono
@@ -808,9 +808,11 @@ constexpr chrono::year operator ""y(unsigned lo
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
+#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
struct _FilesystemClock;
_LIBCPP_END_NAMESPACE_FILESYSTEM
+#endif // !_LIBCPP_CXX03_LANG
_LIBCPP_BEGIN_NAMESPACE_STD