--- Libc/Libc-763.13/include/sys/acl.h
+++ Libc/Libc-1583.60.2/include/sys/acl.h
@@ -25,6 +25,7 @@
 
 #include <Availability.h>
 #include <sys/kauth.h>
+#include <sys/_types/_ssize_t.h>
 
 #define __DARWIN_ACL_READ_DATA			(1<<1)
 #define __DARWIN_ACL_LIST_DIRECTORY		__DARWIN_ACL_READ_DATA
@@ -43,6 +44,7 @@
 #define __DARWIN_ACL_READ_SECURITY		(1<<11)
 #define __DARWIN_ACL_WRITE_SECURITY		(1<<12)
 #define __DARWIN_ACL_CHANGE_OWNER		(1<<13)
+#define __DARWIN_ACL_SYNCHRONIZE		(1<<20)
 
 #define __DARWIN_ACL_EXTENDED_ALLOW		1
 #define __DARWIN_ACL_EXTENDED_DENY		2
@@ -82,6 +84,7 @@
 	ACL_READ_SECURITY	= __DARWIN_ACL_READ_SECURITY,
 	ACL_WRITE_SECURITY	= __DARWIN_ACL_WRITE_SECURITY,
 	ACL_CHANGE_OWNER	= __DARWIN_ACL_CHANGE_OWNER,
+	ACL_SYNCHRONIZE		= __DARWIN_ACL_SYNCHRONIZE,
 } acl_perm_t;
 
 /* 23.2.5 ACL entry tag type bits - nonstandard */