1 files changed, 8 insertions, 8 deletions
diff --git a/libcxx/include/__format/formatter.h b/libcxx/include/__format/formatter.h
index 4816f961c445..900a09af4e99 100644
--- a/libcxx/include/__format/formatter.h
+++ b/libcxx/include/__format/formatter.h
@@ -11,7 +11,6 @@
 #define _LIBCPP___FORMAT_FORMATTER_H
 
 #include <__availability>
-#include <__concepts/same_as.h>
 #include <__config>
 #include <__format/format_fwd.h>
 
@@ -39,15 +38,16 @@ struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter {
   formatter& operator=(const formatter&) = delete;
 };
 
-namespace __formatter {
+#  if _LIBCPP_STD_VER > 20
 
-/** The character types that formatters are specialized for. */
-template <class _CharT>
-concept __char_type = same_as<_CharT, char> || same_as<_CharT, wchar_t>;
+template <class _Tp>
+_LIBCPP_HIDE_FROM_ABI constexpr void __set_debug_format(_Tp& __formatter) {
+  if constexpr (requires { __formatter.set_debug_format(); })
+    __formatter.set_debug_format();
+}
 
-} // namespace __formatter
-
-#endif //_LIBCPP_STD_VER > 17
+#  endif // _LIBCPP_STD_VER > 20
+#endif   // _LIBCPP_STD_VER > 17
 
 _LIBCPP_END_NAMESPACE_STD