diff --git a/libcxx/include/__ranges/size.h b/libcxx/include/__ranges/size.h
--- a/libcxx/include/__ranges/size.h
+++ b/libcxx/include/__ranges/size.h
@@ -89,7 +89,7 @@
     template<__difference _Tp>
     [[nodiscard]] constexpr __integer_like auto operator()(_Tp&& __t) const
         noexcept(noexcept(ranges::end(__t) - ranges::begin(__t))) {
-      return __to_unsigned_like<range_difference_t<remove_cvref_t<_Tp>>>(
+      return __to_unsigned<range_difference_t<remove_cvref_t<_Tp>>>(
           ranges::end(__t) - ranges::begin(__t));
     }
   };
diff --git a/libcxx/include/charconv b/libcxx/include/charconv
--- a/libcxx/include/charconv
+++ b/libcxx/include/charconv
@@ -331,13 +331,6 @@
     return _Tp(~__x + 1);
 }
 
-template <typename _Tp>
-inline _LIBCPP_INLINE_VISIBILITY typename make_unsigned<_Tp>::type
-__to_unsigned(_Tp __x)
-{
-    return static_cast<typename make_unsigned<_Tp>::type>(__x);
-}
-
 template <typename _Tp>
 _LIBCPP_AVAILABILITY_TO_CHARS
 inline _LIBCPP_INLINE_VISIBILITY to_chars_result
diff --git a/libcxx/include/type_traits b/libcxx/include/type_traits
--- a/libcxx/include/type_traits
+++ b/libcxx/include/type_traits
@@ -2309,12 +2309,13 @@
 
 #if _LIBCPP_STD_VER > 11
 template <class _Tp> using make_unsigned_t = typename make_unsigned<_Tp>::type;
+#endif
 
-template<class _From>
-[[nodiscard]] constexpr auto __to_unsigned_like(_From __x) noexcept {
-  return static_cast<make_unsigned_t<_From>>(__x);
+template <class _Tp>
+_LIBCPP_NODISCARD_ATTRIBUTE _LIBCPP_INLINE_VISIBILITY constexpr
+typename make_unsigned<_Tp>::type __to_unsigned(_Tp __x) noexcept {
+    return static_cast<typename make_unsigned<_Tp>::type>(__x);
 }
-#endif
 
 #if _LIBCPP_STD_VER > 14
 template <class...> using void_t = void;