diff --git a/src/unix/internal.h b/src/unix/internal.h
index c7b6019e..ee76c837 100644
--- a/src/unix/internal.h
+++ b/src/unix/internal.h
@@ -52,7 +52,7 @@
 #endif /* _AIX */
 
 #if defined(__APPLE__) && !TARGET_OS_IPHONE
-# include <CoreServices/CoreServices.h>
+# include <AvailabilityMacros.h>
 #endif
 
 #if defined(__ANDROID__)