diff --git a/vendor/github.com/coreos/etcd/client/cancelreq.go b/vendor/github.com/coreos/etcd/client/cancelreq.go
new file mode 100644
index 0000000..76d1f04
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/client/cancelreq.go
@@ -0,0 +1,18 @@
+// Copyright 2015 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.
+
+// borrowed from golang/net/context/ctxhttp/cancelreq.go
+
+package client
+
+import "net/http"
+
+func requestCanceler(tr CancelableTransport, req *http.Request) func() {
+	ch := make(chan struct{})
+	req.Cancel = ch
+
+	return func() {
+		close(ch)
+	}
+}