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
@@ -16,16 +16,16 @@
 
 class SoundDriver_Cocoa : public SoundDriver {
 public:
-	/* virtual */ const char *Start(const char * const *param);
+	const char *Start(const char * const *param) override;
 
-	/* virtual */ void Stop();
-	/* virtual */ const char *GetName() const { return "cocoa"; }
+	void Stop() override;
+	const char *GetName() const override { return "cocoa"; }
 };
 
 class FSoundDriver_Cocoa : public DriverFactoryBase {
 public:
 	FSoundDriver_Cocoa() : DriverFactoryBase(Driver::DT_SOUND, 10, "cocoa", "Cocoa Sound Driver") {}
-	/* virtual */ Driver *CreateInstance() const { return new SoundDriver_Cocoa(); }
+	Driver *CreateInstance() const override { return new SoundDriver_Cocoa(); }
 };
 
 #endif /* SOUND_COCOA_H */