diff --git a/libcxx/include/__mbstate_t.h b/libcxx/include/__mbstate_t.h
--- a/libcxx/include/__mbstate_t.h
+++ b/libcxx/include/__mbstate_t.h
@@ -31,8 +31,8 @@
 #   include <bits/types/mbstate_t.h> // works on most Unixes
 #elif __has_include(<sys/_types/_mbstate_t.h>)
 #   include <sys/_types/_mbstate_t.h> // works on Darwin
-#elif !defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) && __has_include_next(<wchar.h>)
-#   include_next <wchar.h> // fall back to the C standard provider of mbstate_t
+#elif !defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) && __has_include(<wchar.h>)
+#  include <wchar.h> // fall back to the C standard provider of mbstate_t
 #elif __has_include_next(<uchar.h>)
 #   include_next <uchar.h> // <uchar.h> is also required to make mbstate_t visible
 #else