Index: libcxx/include/typeinfo
===================================================================
--- libcxx/include/typeinfo
+++ libcxx/include/typeinfo
@@ -73,12 +73,8 @@
 #include <vcruntime_typeinfo.h>
 #else
 
-#if !defined(_LIBCPP_ABI_MICROSOFT)
-#if defined(_LIBCPP_NONUNIQUE_RTTI_BIT)
-#define _LIBCPP_HAS_NONUNIQUE_TYPEINFO
-#else
-#define _LIBCPP_HAS_UNIQUE_TYPEINFO
-#endif
+#if defined(_LIBCPP_NONUNIQUE_RTTI_BIT) && !defined(_LIBCPP_ABI_MICROSOFT)
+#   define _LIBCPP_HAS_NONUNIQUE_TYPEINFO
 #endif
 
 namespace std  // purposefully not using versioning namespace