diff --git a/include/algorithm b/include/algorithm
index 1403fd6..2fc1f8a 100644
--- a/include/algorithm
+++ b/include/algorithm
@@ -3988,10 +3988,10 @@
     _VSTD::sort<_Tp*, _Comp_ref>(__first.base(), __last.base(), __comp);
 }
 
-#ifdef _MSC_VER
+#ifdef _LIBCPP_MSVC
 #pragma warning( push )
 #pragma warning( disable: 4231)
-#endif // _MSC_VER
+#endif // _LIBCPP_MSVC
 _LIBCPP_EXTERN_TEMPLATE(void __sort<__less<char>&, char*>(char*, char*, __less<char>&))
 _LIBCPP_EXTERN_TEMPLATE(void __sort<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&))
 _LIBCPP_EXTERN_TEMPLATE(void __sort<__less<signed char>&, signed char*>(signed char*, signed char*, __less<signed char>&))
@@ -4025,9 +4025,9 @@
 _LIBCPP_EXTERN_TEMPLATE(bool __insertion_sort_incomplete<__less<long double>&, long double*>(long double*, long double*, __less<long double>&))
 
 _LIBCPP_EXTERN_TEMPLATE(unsigned __sort5<__less<long double>&, long double*>(long double*, long double*, long double*, long double*, long double*, __less<long double>&))
-#ifdef _MSC_VER
+#ifdef _LIBCPP_MSVC
 #pragma warning( pop )
-#endif  // _MSC_VER
+#endif  // _LIBCPP_MSVC
 
 // lower_bound