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-rw-r--r--libstdc++-v3/include/std/version3
1 files changed, 3 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/version b/libstdc++-v3/include/std/version
index f758bcd..21cc28b 100644
--- a/libstdc++-v3/include/std/version
+++ b/libstdc++-v3/include/std/version
@@ -153,6 +153,9 @@
#define __cpp_lib_atomic_ref 201806L
#define __cpp_lib_bind_front 201907L
#define __cpp_lib_bounded_array_traits 201902L
+#if __cpp_concepts
+# define __cpp_lib_concepts 201806L
+#endif
#define __cpp_lib_constexpr 201711L
#define __cpp_lib_constexpr_algorithms 201806L
#if __cpp_impl_destroying_delete