diff --git a/include/support/android/locale_bionic.h b/include/support/android/locale_bionic.h
index d638757fd..dfeb696ed 100644
--- a/include/support/android/locale_bionic.h
+++ b/include/support/android/locale_bionic.h
@@ -26,9 +26,15 @@ extern "C" {
 
 #if defined(__ANDROID__)
 
+#include <support/xlocale/__posix_l_fallback.h>
+
+// If we do not have this header, we are in a platform build rather than an NDK
+// build, which will always be at least as new as the ToT NDK, in which case we
+// don't need any of the inlines below since libc provides them.
+#if __has_include(<android/ndk-version.h>)
+
 #include <android/api-level.h>
 #include <android/ndk-version.h>
-#include <support/xlocale/__posix_l_fallback.h>
 // In NDK versions later than 16, locale-aware functions are provided by
 // legacy_stdlib_inlines.h
 #if __NDK_MAJOR__ <= 16
@@ -62,6 +68,7 @@ inline _LIBCPP_ALWAYS_INLINE long strtol_l(const char* __nptr, char** __endptr,
 #endif // __ANDROID_API__ < 26
 
 #endif // __NDK_MAJOR__ <= 16
+#endif // __has_include(<android/ndk-version.h>)
 #endif // defined(__ANDROID__)
 
 #endif // defined(__BIONIC__)