diff --git a/src/os/file_plan9.go b/src/os/file_plan9.go
index 9edb6bc074..880d56a16f 100644
--- a/src/os/file_plan9.go
+++ b/src/os/file_plan9.go
@@ -11,11 +11,6 @@ import (
 	"time"
 )
 
-// File represents an open file descriptor.
-type File struct {
-	*file
-}
-
 // file is the real representation of *File.
 // The extra level of indirection ensures that no clients of os
 // can overwrite this data, which could cause the finalizer
diff --git a/src/os/file_unix.go b/src/os/file_unix.go
index 5bc2b11622..83a814348f 100644
--- a/src/os/file_unix.go
+++ b/src/os/file_unix.go
@@ -19,11 +19,6 @@ func rename(oldname, newname string) error {
 	return nil
 }
 
-// File represents an open file descriptor.
-type File struct {
-	*file
-}
-
 // file is the real representation of *File.
 // The extra level of indirection ensures that no clients of os
 // can overwrite this data, which could cause the finalizer
diff --git a/src/os/file_windows.go b/src/os/file_windows.go
index 722d4d0823..e1f9f1c33d 100644
--- a/src/os/file_windows.go
+++ b/src/os/file_windows.go
@@ -15,11 +15,6 @@ import (
 	"unsafe"
 )
 
-// File represents an open file descriptor.
-type File struct {
-	*file
-}
-
 // file is the real representation of *File.
 // The extra level of indirection ensures that no clients of os
 // can overwrite this data, which could cause the finalizer
diff --git a/src/os/types.go b/src/os/types.go
index 12b593fa1e..c56548353f 100644
--- a/src/os/types.go
+++ b/src/os/types.go
@@ -12,6 +12,11 @@ import (
 // Getpagesize returns the underlying system's memory page size.
 func Getpagesize() int { return syscall.Getpagesize() }
 
+// File represents an open file descriptor.
+type File struct {
+	*file // os specific
+}
+
 // A FileInfo describes a file and is returned by Stat and Lstat.
 type FileInfo interface {
 	Name() string       // base name of the file