diff --git a/unum/vendor/golang.org/x/net/ipv6/sys_bpf_stub.go b/unum/vendor/golang.org/x/net/ipv6/sys_bpf_stub.go
new file mode 100644
index 0000000..676bea5
--- /dev/null
+++ b/unum/vendor/golang.org/x/net/ipv6/sys_bpf_stub.go
@@ -0,0 +1,16 @@
+// 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 !linux
+
+package ipv6
+
+import (
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setAttachFilter(c *socket.Conn, f []bpf.RawInstruction) error {
+	return errOpNoSupport
+}