diff --git a/libcxx/include/bit b/libcxx/include/bit
--- a/libcxx/include/bit
+++ b/libcxx/include/bit
@@ -83,7 +83,7 @@
          is_integral<_Tp>::value &&
          is_unsigned<_Tp>::value &&
         _IsNotSame<typename remove_cv<_Tp>::type, bool>::value &&
-        _IsNotSame<typename remove_cv<_Tp>::type, signed char>::value &&
+        _IsNotSame<typename remove_cv<_Tp>::type, char>::value &&
         _IsNotSame<typename remove_cv<_Tp>::type, wchar_t>::value &&
         _IsNotSame<typename remove_cv<_Tp>::type, char16_t>::value &&
         _IsNotSame<typename remove_cv<_Tp>::type, char32_t>::value