diff --git a/vendor/golang.org/x/sys/unix/syscall_linux_amd64_gc.go b/vendor/golang.org/x/sys/unix/syscall_linux_amd64_gc.go
new file mode 100644
index 0000000..21a4946
--- /dev/null
+++ b/vendor/golang.org/x/sys/unix/syscall_linux_amd64_gc.go
@@ -0,0 +1,13 @@
+// Copyright 2016 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 amd64,linux
+// +build !gccgo
+
+package unix
+
+import "syscall"
+
+//go:noescape
+func gettimeofday(tv *Timeval) (err syscall.Errno)