--- a/src/music/extmidi.cpp
+++ b/src/music/extmidi.cpp
@@ -16,47 +16,39 @@
 #include <sys/stat.h>
 #include <errno.h>
 
-static struct {
-	char song[MAX_PATH];
-	pid_t pid;
-} _midi;
-
-static void DoPlay();
-static void DoStop();
-
 static FMusicDriver_ExtMidi iFMusicDriver_ExtMidi;
 
 const char* MusicDriver_ExtMidi::Start(const char* const * parm)
 {
-	_midi.song[0] = '\0';
-	_midi.pid = -1;
+	this->song[0] = '\0';
+	this->pid = -1;
 	return NULL;
 }
 
 void MusicDriver_ExtMidi::Stop()
 {
-	_midi.song[0] = '\0';
-	DoStop();
+	this->song[0] = '\0';
+	this->DoStop();
 }
 
 void MusicDriver_ExtMidi::PlaySong(const char* filename)
 {
-	ttd_strlcpy(_midi.song, filename, lengthof(_midi.song));
-	DoStop();
+	ttd_strlcpy(this->song, filename, lengthof(this->song));
+	this->DoStop();
 }
 
 void MusicDriver_ExtMidi::StopSong()
 {
-	_midi.song[0] = '\0';
-	DoStop();
+	this->song[0] = '\0';
+	this->DoStop();
 }
 
 bool MusicDriver_ExtMidi::IsSongPlaying()
 {
-	if (_midi.pid != -1 && waitpid(_midi.pid, NULL, WNOHANG) == _midi.pid)
-		_midi.pid = -1;
-	if (_midi.pid == -1 && _midi.song[0] != '\0') DoPlay();
-	return _midi.pid != -1;
+	if (this->pid != -1 && waitpid(this->pid, NULL, WNOHANG) == this->pid)
+		this->pid = -1;
+	if (this->pid == -1 && this->song[0] != '\0') this->DoPlay();
+	return this->pid != -1;
 }
 
 void MusicDriver_ExtMidi::SetVolume(byte vol)
@@ -64,10 +56,10 @@
 	DEBUG(driver, 1, "extmidi: set volume not implemented");
 }
 
-static void DoPlay()
+void MusicDriver_ExtMidi::DoPlay()
 {
-	_midi.pid = fork();
-	switch (_midi.pid) {
+	this->pid = fork();
+	switch (this->pid) {
 		case 0: {
 			int d;
 
@@ -75,9 +67,9 @@
 			d = open("/dev/null", O_RDONLY);
 			if (d != -1 && dup2(d, 1) != -1 && dup2(d, 2) != -1) {
 				#if defined(MIDI_ARG)
-					execlp(msf.extmidi, "extmidi", MIDI_ARG, _midi.song, (char*)0);
+					execlp(msf.extmidi, "extmidi", MIDI_ARG, this->song, (char*)0);
 				#else
-					execlp(msf.extmidi, "extmidi", _midi.song, (char*)0);
+					execlp(msf.extmidi, "extmidi", this->song, (char*)0);
 				#endif
 			}
 			_exit(1);
@@ -88,14 +80,14 @@
 			/* FALLTHROUGH */
 
 		default:
-			_midi.song[0] = '\0';
+			this->song[0] = '\0';
 			break;
 	}
 }
 
-static void DoStop()
+void MusicDriver_ExtMidi::DoStop()
 {
-	if (_midi.pid != -1) kill(_midi.pid, SIGTERM);
+	if (this->pid != -1) kill(this->pid, SIGTERM);
 }
 
 #endif /* __MORPHOS__ */

--- a/src/music/extmidi.h
+++ b/src/music/extmidi.h
@@ -6,6 +6,13 @@
 #include "music_driver.hpp"
 
 class MusicDriver_ExtMidi: public MusicDriver {
+private:
+	char song[MAX_PATH];
+	pid_t pid;
+
+	void DoPlay();
+	void DoStop();
+
 public:
 	/* virtual */ bool CanProbe() { return true; }