diff --git a/unix/linux/types.go b/unix/linux/types.go
index d563a0cf..c8d176ef 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -902,6 +902,9 @@ const (
 	AT_SYMLINK_NOFOLLOW = C.AT_SYMLINK_NOFOLLOW
 
 	AT_EACCESS = C.AT_EACCESS
+
+	OPEN_TREE_CLONE   = C.OPEN_TREE_CLONE
+	OPEN_TREE_CLOEXEC = C.OPEN_TREE_CLOEXEC
 )
 
 type OpenHow C.struct_open_how
diff --git a/unix/syscall_linux.go b/unix/syscall_linux.go
index bda98498..298323eb 100644
--- a/unix/syscall_linux.go
+++ b/unix/syscall_linux.go
@@ -1860,6 +1860,7 @@ func Getpgrp() (pid int) {
 //sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
 //sys	Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
 //sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)
+//sys	OpenTree(dfd int, fileName string, flags uint) (r int, err error)
 //sys	PerfEventOpen(attr *PerfEventAttr, pid int, cpu int, groupFd int, flags int) (fd int, err error)
 //sys	PivotRoot(newroot string, putold string) (err error) = SYS_PIVOT_ROOT
 //sysnb	Prlimit(pid int, resource int, newlimit *Rlimit, old *Rlimit) (err error) = SYS_PRLIMIT64
diff --git a/unix/zsyscall_linux.go b/unix/zsyscall_linux.go
index 78d74520..ca65ac82 100644
--- a/unix/zsyscall_linux.go
+++ b/unix/zsyscall_linux.go
@@ -1215,6 +1215,22 @@ func Nanosleep(time *Timespec, leftover *Timespec) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func OpenTree(dfd int, fileName string, flags uint) (r int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(fileName)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_OPEN_TREE, uintptr(dfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+	r = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func PerfEventOpen(attr *PerfEventAttr, pid int, cpu int, groupFd int, flags int) (fd int, err error) {
 	r0, _, e1 := Syscall6(SYS_PERF_EVENT_OPEN, uintptr(unsafe.Pointer(attr)), uintptr(pid), uintptr(cpu), uintptr(groupFd), uintptr(flags), 0)
 	fd = int(r0)
diff --git a/unix/ztypes_linux.go b/unix/ztypes_linux.go
index 2c26466e..41b0cd09 100644
--- a/unix/ztypes_linux.go
+++ b/unix/ztypes_linux.go
@@ -750,6 +750,9 @@ const (
 
 	AT_RECURSIVE = 0x8000
 
+	OPEN_TREE_CLONE   = 0x1
+	OPEN_TREE_CLOEXEC = 0x80000
+
 	AT_SYMLINK_FOLLOW   = 0x400
 	AT_SYMLINK_NOFOLLOW = 0x100