diff --git a/backend/smtc.go b/backend/smtc.go
index 6df9069b..f1b56b6d 100644
--- a/backend/smtc.go
+++ b/backend/smtc.go
@@ -1,159 +1,159 @@
-//go:build windows
-
-package backend
-
-/*
-#cgo CFLAGS: -I .
-void btn_callback_cgo(int in);
-void seek_callback_cgo(int in);
-*/
-import "C"
-
-import (
-	"errors"
-	"fmt"
-	"unsafe"
-
-	"golang.org/x/sys/windows"
-)
-
-type SMTCPlaybackState int
-type SMTCButton int
-
-const (
-	// constants from smtc.h in github.com/supersonic-app/smtc-dll
-	SMTCPlaybackStateStopped SMTCPlaybackState = 2
-	SMTCPlaybackStatePlaying SMTCPlaybackState = 3
-	SMTCPlaybackStatePaused  SMTCPlaybackState = 4
-
-	SMTCButtonPlay     SMTCButton = 0
-	SMTCButtonPause    SMTCButton = 1
-	SMTCButtonStop     SMTCButton = 2
-	SMTCButtonPrevious SMTCButton = 4
-	SMTCButtonNext     SMTCButton = 5
-)
-
-type SMTC struct {
-	dll *windows.DLL
-
-	onButtonPressed func(SMTCButton)
-	onSeek          func(int)
-}
-
-var smtcInstance *SMTC
-
-func InitSMTCForWindow(hwnd uintptr) (*SMTC, error) {
-	dll, err := windows.LoadDLL("smtc.dll")
-	if err != nil {
-		return nil, err
-	}
-
-	proc, err := dll.FindProc("InitializeForWindow")
-	if err != nil {
-		return nil, err
-	}
-
-	hr, _, _ := proc.Call(hwnd, uintptr(unsafe.Pointer(C.btn_callback_cgo)), uintptr(unsafe.Pointer(C.seek_callback_cgo)))
-	if hr < 0 {
-		return nil, fmt.Errorf("InitializeForWindow failed with HRESULT=%d", hr)
-	}
-
-	smtcInstance = &SMTC{dll: dll}
-	return smtcInstance, nil
-}
-
-func (s *SMTC) OnButtonPressed(f func(SMTCButton)) {
-	s.onButtonPressed = f
-}
-
-func (s *SMTC) OnSeek(f func(millis int)) {
-	s.onSeek = f
-}
-
-func (s *SMTC) Shutdown() {
-	if s.dll == nil {
-		return
-	}
-	proc, err := s.dll.FindProc("Destroy")
-	if err == nil {
-		proc.Call()
-	}
-
-	s.dll.Release()
-	s.dll = nil
-	smtcInstance = nil
-}
-
-func (s *SMTC) UpdatePlaybackState(state SMTCPlaybackState) error {
-	if s.dll == nil {
-		return errors.New("SMTC DLL not available")
-	}
-
-	proc, err := s.dll.FindProc("UpdatePlaybackState")
-	if err != nil {
-		return err
-	}
-
-	if hr, _, _ := proc.Call(uintptr(state)); hr < 0 {
-		return fmt.Errorf("UpdatePlaybackState failed with HRESULT=%d", hr)
-	}
-	return nil
-}
-
-func (s *SMTC) UpdateMetadata(title, artist string) error {
-	if s.dll == nil {
-		return errors.New("SMTC DLL not available")
-	}
-
-	utfTitle, err := windows.UTF16PtrFromString(title)
-	if err != nil {
-		return err
-	}
-
-	utfArtist, err := windows.UTF16PtrFromString(artist)
-	if err != nil {
-		return err
-	}
-
-	proc, err := s.dll.FindProc("UpdateMetadata")
-	if err != nil {
-		return err
-	}
-
-	hr, _, _ := proc.Call(uintptr(unsafe.Pointer(utfTitle)), uintptr(unsafe.Pointer(utfArtist)))
-	if hr < 0 {
-		return fmt.Errorf("UpdateMetadata failed with HRESULT=%d", hr)
-	}
-	return nil
-}
-
-func (s *SMTC) UpdatePosition(positionMillis, durationMillis int) error {
-	if s.dll == nil {
-		return errors.New("SMTC DLL not available")
-	}
-
-	proc, err := s.dll.FindProc("UpdatePosition")
-	if err != nil {
-		return err
-	}
-
-	hr, _, _ := proc.Call(uintptr(positionMillis), uintptr(durationMillis))
-	if hr < 0 {
-		return fmt.Errorf("UpdatePosition failed with HRESULT=%d", hr)
-	}
-	return nil
-}
-
-//export btnCallback
-func btnCallback(in int) {
-	if smtcInstance != nil && smtcInstance.onButtonPressed != nil {
-		smtcInstance.onButtonPressed(SMTCButton(in))
-	}
-}
-
-//export seekCallback
-func seekCallback(millis int) {
-	if smtcInstance != nil && smtcInstance.onSeek != nil {
-		smtcInstance.onSeek(millis)
-	}
-}
+//go:build windows
+
+package backend
+
+/*
+#cgo CFLAGS: -I .
+void btn_callback_cgo(int in);
+void seek_callback_cgo(int in);
+*/
+import "C"
+
+import (
+	"errors"
+	"fmt"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+type SMTCPlaybackState int
+type SMTCButton int
+
+const (
+	// constants from smtc.h in github.com/supersonic-app/smtc-dll
+	SMTCPlaybackStateStopped SMTCPlaybackState = 2
+	SMTCPlaybackStatePlaying SMTCPlaybackState = 3
+	SMTCPlaybackStatePaused  SMTCPlaybackState = 4
+
+	SMTCButtonPlay     SMTCButton = 0
+	SMTCButtonPause    SMTCButton = 1
+	SMTCButtonStop     SMTCButton = 2
+	SMTCButtonPrevious SMTCButton = 4
+	SMTCButtonNext     SMTCButton = 5
+)
+
+type SMTC struct {
+	dll *windows.DLL
+
+	onButtonPressed func(SMTCButton)
+	onSeek          func(int)
+}
+
+var smtcInstance *SMTC
+
+func InitSMTCForWindow(hwnd uintptr) (*SMTC, error) {
+	dll, err := windows.LoadDLL("smtc.dll")
+	if err != nil {
+		return nil, err
+	}
+
+	proc, err := dll.FindProc("InitializeForWindow")
+	if err != nil {
+		return nil, err
+	}
+
+	hr, _, _ := proc.Call(hwnd, uintptr(unsafe.Pointer(C.btn_callback_cgo)), uintptr(unsafe.Pointer(C.seek_callback_cgo)))
+	if hr < 0 {
+		return nil, fmt.Errorf("InitializeForWindow failed with HRESULT=%d", hr)
+	}
+
+	smtcInstance = &SMTC{dll: dll}
+	return smtcInstance, nil
+}
+
+func (s *SMTC) OnButtonPressed(f func(SMTCButton)) {
+	s.onButtonPressed = f
+}
+
+func (s *SMTC) OnSeek(f func(millis int)) {
+	s.onSeek = f
+}
+
+func (s *SMTC) Shutdown() {
+	if s.dll == nil {
+		return
+	}
+	proc, err := s.dll.FindProc("Destroy")
+	if err == nil {
+		proc.Call()
+	}
+
+	s.dll.Release()
+	s.dll = nil
+	smtcInstance = nil
+}
+
+func (s *SMTC) UpdatePlaybackState(state SMTCPlaybackState) error {
+	if s.dll == nil {
+		return errors.New("SMTC DLL not available")
+	}
+
+	proc, err := s.dll.FindProc("UpdatePlaybackState")
+	if err != nil {
+		return err
+	}
+
+	if hr, _, _ := proc.Call(uintptr(state)); hr < 0 {
+		return fmt.Errorf("UpdatePlaybackState failed with HRESULT=%d", hr)
+	}
+	return nil
+}
+
+func (s *SMTC) UpdateMetadata(title, artist string) error {
+	if s.dll == nil {
+		return errors.New("SMTC DLL not available")
+	}
+
+	utfTitle, err := windows.UTF16PtrFromString(title)
+	if err != nil {
+		return err
+	}
+
+	utfArtist, err := windows.UTF16PtrFromString(artist)
+	if err != nil {
+		return err
+	}
+
+	proc, err := s.dll.FindProc("UpdateMetadata")
+	if err != nil {
+		return err
+	}
+
+	hr, _, _ := proc.Call(uintptr(unsafe.Pointer(utfTitle)), uintptr(unsafe.Pointer(utfArtist)))
+	if hr < 0 {
+		return fmt.Errorf("UpdateMetadata failed with HRESULT=%d", hr)
+	}
+	return nil
+}
+
+func (s *SMTC) UpdatePosition(positionMillis, durationMillis int) error {
+	if s.dll == nil {
+		return errors.New("SMTC DLL not available")
+	}
+
+	proc, err := s.dll.FindProc("UpdatePosition")
+	if err != nil {
+		return err
+	}
+
+	hr, _, _ := proc.Call(uintptr(positionMillis), uintptr(durationMillis))
+	if hr < 0 {
+		return fmt.Errorf("UpdatePosition failed with HRESULT=%d", hr)
+	}
+	return nil
+}
+
+//export btnCallback
+func btnCallback(in int) {
+	if smtcInstance != nil && smtcInstance.onButtonPressed != nil {
+		smtcInstance.onButtonPressed(SMTCButton(in))
+	}
+}
+
+//export seekCallback
+func seekCallback(millis int) {
+	if smtcInstance != nil && smtcInstance.onSeek != nil {
+		smtcInstance.onSeek(millis)
+	}
+}
diff --git a/backend/smtc_cfuncs.go b/backend/smtc_cfuncs.go
index 9c1b317c..9ccd9491 100644
--- a/backend/smtc_cfuncs.go
+++ b/backend/smtc_cfuncs.go
@@ -1,16 +1,16 @@
-//go:build windows
-
-package backend
-
-/*
-void btn_callback_cgo(int in) {
-	void btnCallback(int);
-	btnCallback(in);
-}
-
-void seek_callback_cgo(int in) {
-	void seekCallback(int);
-	seekCallback(in);
-}
-*/
-import "C"
+//go:build windows
+
+package backend
+
+/*
+void btn_callback_cgo(int in) {
+	void btnCallback(int);
+	btnCallback(in);
+}
+
+void seek_callback_cgo(int in) {
+	void seekCallback(int);
+	seekCallback(in);
+}
+*/
+import "C"
diff --git a/backend/smtc_unsupported.go b/backend/smtc_unsupported.go
index 36c0ba19..6a19e8d7 100644
--- a/backend/smtc_unsupported.go
+++ b/backend/smtc_unsupported.go
@@ -1,32 +1,47 @@
-//go:build !windows
-
-package backend
-
-import "errors"
-
-type SMTCPlaybackState int
-
-const (
-	SMTCPlaybackStateStopped SMTCPlaybackState = 0
-	SMTCPlaybackStatePlaying SMTCPlaybackState = 1
-	SMTCPlaybackStatePaused  SMTCPlaybackState = 2
-)
-
-type SMTC struct{}
-
-var smtcUnsupportedErr = errors.New("SMTC is not supported on this platformo")
-
-func InitSMTCForWindow(hwnd uintptr) (*SMTC, error) {
-	return nil, smtcUnsupportedErr
-}
-
-func (s *SMTC) UpdatePlaybackState(state SMTCPlaybackState) error {
-	return smtcUnsupportedErr
-}
-
-func (s *SMTC) UpdateMetadata(title, artist string) error {
-	return smtcUnsupportedErr
-}
-
-func (s *SMTC) Shutdown() {
-}
+//go:build !windows
+
+package backend
+
+import "errors"
+
+type SMTCPlaybackState int
+type SMTCButton int
+
+const (
+	// constants from smtc.h in github.com/supersonic-app/smtc-dll
+	SMTCPlaybackStateStopped SMTCPlaybackState = 2
+	SMTCPlaybackStatePlaying SMTCPlaybackState = 3
+	SMTCPlaybackStatePaused  SMTCPlaybackState = 4
+
+	SMTCButtonPlay     SMTCButton = 0
+	SMTCButtonPause    SMTCButton = 1
+	SMTCButtonStop     SMTCButton = 2
+	SMTCButtonPrevious SMTCButton = 4
+	SMTCButtonNext     SMTCButton = 5
+)
+
+type SMTC struct{}
+
+var smtcUnsupportedErr = errors.New("SMTC is not supported on this platformo")
+
+func InitSMTCForWindow(hwnd uintptr) (*SMTC, error) {
+	return nil, smtcUnsupportedErr
+}
+
+func (s *SMTC) OnButtonPressed(func(SMTCButton)) {}
+
+func (s *SMTC) OnSeek(f func(millis int)) {}
+
+func (s *SMTC) Shutdown() {}
+
+func (s *SMTC) UpdatePlaybackState(state SMTCPlaybackState) error {
+	return smtcUnsupportedErr
+}
+
+func (s *SMTC) UpdateMetadata(title, artist string) error {
+	return smtcUnsupportedErr
+}
+
+func (s *SMTC) UpdatePosition(positionMillis, durationMillis int) error {
+	return smtcUnsupportedErr
+}
diff --git a/go.mod b/go.mod
index e20b4539..ab5a6851 100644
--- a/go.mod
+++ b/go.mod
@@ -20,6 +20,7 @@ require (
 	github.com/supersonic-app/go-subsonic v0.0.0-20241224013245-9b2841f3711d
 	github.com/zalando/go-keyring v0.2.1
 	golang.org/x/net v0.25.0
+	golang.org/x/sys v0.20.0
 	golang.org/x/text v0.16.0
 )
 
@@ -50,7 +51,6 @@ require (
 	github.com/yuin/goldmark v1.7.1 // indirect
 	golang.org/x/image v0.18.0 // indirect
 	golang.org/x/mobile v0.0.0-20231127183840-76ac6878050a // indirect
-	golang.org/x/sys v0.20.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )