diff --git a/libcxx/include/__config b/libcxx/include/__config
index 22916dbe6f2f..492abf0e5461 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -656,12 +656,6 @@ template <unsigned> struct __static_assert_check {};
 #  define _LIBCPP_TRIVIAL_PAIR_COPY_CTOR 1
 #endif
 
-#if !defined(__APPLE__) && \
-    ((!defined(_POSIX_TIMERS) || _POSIX_TIMERS < 0) || \
-     (!defined(_POSIX_MONOTONIC_CLOCK) || _POSIX_MONOTONIC_CLOCK < 0))
-#define _LIBCPP_HAS_NO_MONOTONIC_CLOCK
-#endif
-
 #ifndef _LIBCPP_STD_VER
 #  if  __cplusplus <= 201103L
 #    define _LIBCPP_STD_VER 11