diff --git a/vendor/golang.org/x/sys/unix/syscall_darwin_amd64.go b/vendor/golang.org/x/sys/unix/syscall_darwin_amd64.go
index fdbfb59..914b89b 100644
--- a/vendor/golang.org/x/sys/unix/syscall_darwin_amd64.go
+++ b/vendor/golang.org/x/sys/unix/syscall_darwin_amd64.go
@@ -10,8 +10,6 @@
 	"syscall"
 )
 
-//sys   ptrace(request int, pid int, addr uintptr, data uintptr) (err error)
-
 func setTimespec(sec, nsec int64) Timespec {
 	return Timespec{Sec: sec, Nsec: nsec}
 }
@@ -45,10 +43,6 @@
 	msghdr.Controllen = uint32(length)
 }
 
-func (msghdr *Msghdr) SetIovlen(length int) {
-	msghdr.Iovlen = int32(length)
-}
-
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
@@ -62,6 +56,7 @@
 //sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
 //sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
 //sys	Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64
+//sys	Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64
 //sys	getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) = SYS_GETFSSTAT64
 //sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
 //sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64