Index: include/__config
===================================================================
--- include/__config
+++ include/__config
@@ -985,17 +985,18 @@
 #define _DECLARE_C99_LDBL_MATH 1
 #endif
 
+#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
+#  define _LIBCPP_DEFER_NEW_TO_VCRUNTIME
+#endif
+
 // If we are getting operator new from the MSVC CRT, then allocation overloads
 // for align_val_t were added in 19.12, aka VS 2017 version 15.3.
 #if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
 #  define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
-#elif defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
-#  define _LIBCPP_DEFER_NEW_TO_VCRUNTIME
-#  if !defined(__cpp_aligned_new)
-     // We're defering to Microsoft's STL to provide aligned new et al. We don't
-     // have it unless the language feature test macro is defined.
-#    define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
-#  endif
+#elif defined(_LIBCPP_DEFER_NEW_TO_VCRUNTIME) && !defined(__cpp_aligned_new)
+   // We're defering to Microsoft's STL to provide aligned new et al. We don't
+   // have it unless the language feature test macro is defined.
+#  define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
 #endif
 
 #if defined(__APPLE__)