diff --git a/unum/vendor/golang.org/x/net/internal/socket/iovec_64bit.go b/unum/vendor/golang.org/x/net/internal/socket/iovec_64bit.go
new file mode 100644
index 0000000..2ae435e
--- /dev/null
+++ b/unum/vendor/golang.org/x/net/internal/socket/iovec_64bit.go
@@ -0,0 +1,15 @@
+// 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 arm64 amd64 ppc64 ppc64le mips64 mips64le s390x
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package socket
+
+import "unsafe"
+
+func (v *iovec) set(b []byte) {
+	v.Base = (*byte)(unsafe.Pointer(&b[0]))
+	v.Len = uint64(len(b))
+}