diff --git a/libcxx/include/__math/traits.h b/libcxx/include/__math/traits.h
index 2be3f76a8f3465d..92a758e52718310 100644
--- a/libcxx/include/__math/traits.h
+++ b/libcxx/include/__math/traits.h
@@ -93,7 +93,7 @@ _LIBCPP_NODISCARD inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI boo
 //
 // When libc++ is layered on top of Bionic's libc, `math.h` exposes a function prototype for `isinf(double)`
 // with return type `int`. This function prototype in Bionic's libc is not guarded by any preprocessor macros.
-#if !(defined(_LIBCPP_CXX03_LANG) && defined(__GLIBC__)) && !defined(__BIONIC__)
+#if (!(defined(_LIBCPP_CXX03_LANG) && defined(__GLIBC__)) && !defined(__BIONIC__)) || _LIBCPP_STD_VER >= 23
 _LIBCPP_NODISCARD inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isinf(double __x) _NOEXCEPT {
   return __builtin_isinf(__x);
 }
@@ -129,7 +129,7 @@ _LIBCPP_NODISCARD inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI boo
 //
 // When libc++ is layered on top of Bionic's libc, `math.h` exposes a function prototype for `isnan(double)`
 // with return type `int`. This function prototype in Bionic's libc is not guarded by any preprocessor macros.
-#if !(defined(_LIBCPP_CXX03_LANG) && defined(__GLIBC__)) && !defined(__BIONIC__)
+#if (!(defined(_LIBCPP_CXX03_LANG) && defined(__GLIBC__)) && !defined(__BIONIC__)) || _LIBCPP_STD_VER >= 23
 _LIBCPP_NODISCARD inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isnan(double __x) _NOEXCEPT {
   return __builtin_isnan(__x);
 }