diff --git a/src/buildtools/third_party/libc++/__config_site b/src/buildtools/third_party/libc++/__config_site
index 8e1fb11322..dad6182997 100644
--- a/src/buildtools/third_party/libc++/__config_site
+++ b/src/buildtools/third_party/libc++/__config_site
@@ -26,9 +26,7 @@
 #define _LIBCPP_HAS_MONOTONIC_CLOCK 1
 #define _LIBCPP_HAS_TERMINAL 1
 
-#ifdef ANDROID_HOST_MUSL
-#define _LIBCPP_HAS_MUSL_LIBC 1
-#else
+#ifndef _LIBCPP_HAS_MUSL_LIBC
 #define _LIBCPP_HAS_MUSL_LIBC 0
 #endif