# define MDS_XATTR_NAME_ACL_ACCESS XATTR_NAME_ACL_ACCESS
# define mds_xattr_acl_size(entry) xattr_acl_size(entry)
# else /* HAVE_XATTR_ACL */
-# define MDS_XATTR_NAME_ACL_ACCESS POSIX_ACL_XATTR_ACCESS
-# define mds_xattr_acl_size(entry) posix_acl_xattr_size(entry)
+# ifdef HAVE_LINUX_POSIX_ACL_XATTR_H
+# define MDS_XATTR_NAME_ACL_ACCESS POSIX_ACL_XATTR_ACCESS
+# define mds_xattr_acl_size(entry) posix_acl_xattr_size(entry)
+# endif /* HAVE_LINUX_POSIX_ACL_XATTR_H */
# endif /* HAVE_XATTR_ACL */
# define LUSTRE_POSIX_ACL_MAX_ENTRIES (32)