--- boost/core/uncaught_exceptions.hpp.orig
+++ boost/core/uncaught_exceptions.hpp
@@ -27,7 +27,7 @@
 #endif
 
 #if defined(__APPLE__)
-#include <Availability.h>
+#include <AvailabilityMacros.h>
 // Apple systems only support std::uncaught_exceptions starting with specific versions:
 // - Mac OS >= 10.12
 // - iOS >= 10.0
