diff --git a/fileinfo.go b/fileinfo.go
deleted file mode 100644
index 83315ff..0000000
--- a/fileinfo.go
+++ /dev/null
@@ -1,14 +0,0 @@
-package copy
-
-import "io/fs"
-
-// A FileInfo describes a file and is returned by Stat.
-// This is a cloned definition of fs.FileInfo (go1.16~).
-type fileInfo interface {
-	// Name() string       // base name of the file
-	// Size() int64        // length in bytes for regular files; system-dependent for others
-	Mode() fs.FileMode // file mode bits
-	// ModTime() time.Time // modification time
-	IsDir() bool      // abbreviation for Mode().IsDir()
-	Sys() interface{} // underlying data source (can return nil)
-}
diff --git a/permission_control.go b/permission_control.go
index 97ae12d..cb4777c 100644
--- a/permission_control.go
+++ b/permission_control.go
@@ -1,6 +1,7 @@
 package copy
 
 import (
+	"io/fs"
 	"os"
 )
 
@@ -11,11 +12,11 @@ const (
 	tmpPermissionForDirectory = os.FileMode(0755)
 )
 
-type PermissionControlFunc func(srcinfo fileInfo, dest string) (chmodfunc func(*error), err error)
+type PermissionControlFunc func(srcinfo fs.FileInfo, dest string) (chmodfunc func(*error), err error)
 
 var (
 	AddPermission = func(perm os.FileMode) PermissionControlFunc {
-		return func(srcinfo fileInfo, dest string) (func(*error), error) {
+		return func(srcinfo fs.FileInfo, dest string) (func(*error), error) {
 			orig := srcinfo.Mode()
 			if srcinfo.IsDir() {
 				if err := os.MkdirAll(dest, tmpPermissionForDirectory); err != nil {
@@ -28,7 +29,7 @@ var (
 		}
 	}
 	PerservePermission PermissionControlFunc = AddPermission(0)
-	DoNothing          PermissionControlFunc = func(srcinfo fileInfo, dest string) (func(*error), error) {
+	DoNothing          PermissionControlFunc = func(srcinfo fs.FileInfo, dest string) (func(*error), error) {
 		if srcinfo.IsDir() {
 			if err := os.MkdirAll(dest, srcinfo.Mode()); err != nil {
 				return func(*error) {}, err
diff --git a/preserve_owner.go b/preserve_owner.go
index 13ec4f5..ca71132 100644
--- a/preserve_owner.go
+++ b/preserve_owner.go
@@ -4,11 +4,12 @@
 package copy
 
 import (
+	"io/fs"
 	"os"
 	"syscall"
 )
 
-func preserveOwner(src, dest string, info fileInfo) (err error) {
+func preserveOwner(src, dest string, info fs.FileInfo) (err error) {
 	if info == nil {
 		if info, err = os.Stat(src); err != nil {
 			return err
diff --git a/preserve_owner_x.go b/preserve_owner_x.go
index 9d82574..d6a6148 100644
--- a/preserve_owner_x.go
+++ b/preserve_owner_x.go
@@ -3,6 +3,8 @@
 
 package copy
 
-func preserveOwner(src, dest string, info fileInfo) (err error) {
+import "io/fs"
+
+func preserveOwner(src, dest string, info fs.FileInfo) (err error) {
 	return nil
 }