diff -ru a/absl/base/config.h b/absl/base/config.h
--- a/absl/base/config.h
+++ b/absl/base/config.h
@@ -558,9 +558,9 @@
         __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 50000) ||   \
        (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) &&      \
         __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 120000))))
-#define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 1
+// #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 1
 #else
-#define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 0
+// #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 0
 #endif
 
 // ABSL_HAVE_STD_ANY