diff --git a/unum/vendor/golang.org/x/net/internal/socket/msghdr_openbsd.go b/unum/vendor/golang.org/x/net/internal/socket/msghdr_openbsd.go
new file mode 100644
index 0000000..be354ff
--- /dev/null
+++ b/unum/vendor/golang.org/x/net/internal/socket/msghdr_openbsd.go
@@ -0,0 +1,10 @@
+// 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.
+
+package socket
+
+func (h *msghdr) setIov(vs []iovec) {
+	h.Iov = &vs[0]
+	h.Iovlen = uint32(len(vs))
+}