diff --git a/src/os/error_posix.go b/src/os/error_posix.go
deleted file mode 100644
index b159c036c1..0000000000
--- a/src/os/error_posix.go
+++ /dev/null
@@ -1,18 +0,0 @@
-// 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.
-
-//go:build unix || (js && wasm) || wasip1 || windows
-
-package os
-
-import "syscall"
-
-// wrapSyscallError takes an error and a syscall name. If the error is
-// a syscall.Errno, it wraps it in an os.SyscallError using the syscall name.
-func wrapSyscallError(name string, err error) error {
-	if _, ok := err.(syscall.Errno); ok {
-		err = NewSyscallError(name, err)
-	}
-	return err
-}
diff --git a/src/os/zero_copy_linux.go b/src/os/zero_copy_linux.go
index 7c45aefeee..d9cf18c22f 100644
--- a/src/os/zero_copy_linux.go
+++ b/src/os/zero_copy_linux.go
@@ -16,6 +16,15 @@ var (
 	pollSendFile      = poll.SendFile
 )
 
+// wrapSyscallError takes an error and a syscall name. If the error is
+// a syscall.Errno, it wraps it in an os.SyscallError using the syscall name.
+func wrapSyscallError(name string, err error) error {
+	if _, ok := err.(syscall.Errno); ok {
+		err = NewSyscallError(name, err)
+	}
+	return err
+}
+
 func (f *File) writeTo(w io.Writer) (written int64, handled bool, err error) {
 	pfd, network := getPollFDAndNetwork(w)
 	// TODO(panjf2000): same as File.spliceToFile.