diff --git a/unum/vendor/golang.org/x/sys/unix/syscall_openbsd_arm.go b/unum/vendor/golang.org/x/sys/unix/syscall_openbsd_arm.go
new file mode 100644
index 0000000..14ddaf3
--- /dev/null
+++ b/unum/vendor/golang.org/x/sys/unix/syscall_openbsd_arm.go
@@ -0,0 +1,44 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build arm,openbsd
+
+package unix
+
+import "syscall"
+
+func Getpagesize() int { return syscall.Getpagesize() }
+
+func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
+
+func NsecToTimespec(nsec int64) (ts Timespec) {
+	ts.Sec = int64(nsec / 1e9)
+	ts.Nsec = int32(nsec % 1e9)
+	return
+}
+
+func NsecToTimeval(nsec int64) (tv Timeval) {
+	nsec += 999 // round up to microsecond
+	tv.Usec = int32(nsec % 1e9 / 1e3)
+	tv.Sec = int64(nsec / 1e9)
+	return
+}
+
+func SetKevent(k *Kevent_t, fd, mode, flags int) {
+	k.Ident = uint32(fd)
+	k.Filter = int16(mode)
+	k.Flags = uint16(flags)
+}
+
+func (iov *Iovec) SetLen(length int) {
+	iov.Len = uint32(length)
+}
+
+func (msghdr *Msghdr) SetControllen(length int) {
+	msghdr.Controllen = uint32(length)
+}
+
+func (cmsg *Cmsghdr) SetLen(length int) {
+	cmsg.Len = uint32(length)
+}