diff --git a/src/sound/cocoa_s.h b/src/sound/cocoa_s.h
--- a/src/sound/cocoa_s.h
+++ b/src/sound/cocoa_s.h
@@ -3,8 +3,22 @@
 #ifndef SOUND_COCOA_H
 #define SOUND_COCOA_H
 
-#include "../hal.h"
+#include "sound_driver.hpp"
+
+class SoundDriver_Cocoa: public SoundDriver {
+public:
+	/* virtual */ bool CanProbe() { return true; }
+
+	/* virtual */ const char *Start(const char * const *param);
 
-extern const HalSoundDriver _cocoa_sound_driver;
+	/* virtual */ void Stop();
+};
+
+class FSoundDriver_Cocoa: public SoundDriverFactory<FSoundDriver_Cocoa> {
+public:
+	/* virtual */ const char *GetName() { return "cocoa"; }
+	/* virtual */ const char *GetDescription() { return "Cocoa Sound Driver"; }
+	/* virtual */ Driver *CreateInstance() { return new SoundDriver_Cocoa(); }
+};
 
 #endif /* SOUND_COCOA_H */