diff --git a/src/runtime/export_pipe2_test.go b/src/runtime/export_pipe2_test.go
new file mode 100644
index 0000000..9d580d3
--- /dev/null
+++ b/src/runtime/export_pipe2_test.go
@@ -0,0 +1,15 @@
+// Copyright 2020 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 freebsd linux netbsd openbsd solaris
+
+package runtime
+
+func Pipe() (r, w int32, errno int32) {
+	r, w, errno = pipe2(0)
+	if errno == _ENOSYS {
+		return pipe()
+	}
+	return r, w, errno
+}
diff --git a/src/runtime/export_pipe_test.go b/src/runtime/export_pipe_test.go
new file mode 100644
index 0000000..8f66770
--- /dev/null
+++ b/src/runtime/export_pipe_test.go
@@ -0,0 +1,9 @@
+// Copyright 2020 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 aix darwin dragonfly
+
+package runtime
+
+var Pipe = pipe
diff --git a/src/runtime/export_unix_test.go b/src/runtime/export_unix_test.go
index 621488e..307c63f 100644
--- a/src/runtime/export_unix_test.go
+++ b/src/runtime/export_unix_test.go
@@ -9,7 +9,6 @@
 import "unsafe"
 
 var NonblockingPipe = nonblockingPipe
-var Pipe = pipe
 var SetNonblock = setNonblock
 var Closeonexec = closeonexec