--- hatari/src/includes/audio.h	2019/04/01 07:11:28	1.1.1.5
+++ hatari/src/includes/audio.h	2019/04/01 07:14:44	1.1.1.7
@@ -16,8 +16,8 @@ enum
   FREQ_44Khz
 };
 
-extern int SoundPlayBackFrequencies[];
-extern BOOL bSoundWorking;
+extern const int SoundPlayBackFrequencies[];
+extern bool bSoundWorking;
 extern int OutputAudioFreqIndex;
 extern int SoundBufferSize;
 extern int CompleteSndBufIdx;
@@ -28,6 +28,6 @@ extern void Audio_Lock(void);
 extern void Audio_Unlock(void);
 extern void Audio_FreeSoundBuffer(void);
 extern void Audio_SetOutputAudioFreq(int Frequency);
-extern void Audio_EnableAudio(BOOL bEnable);
+extern void Audio_EnableAudio(bool bEnable);
 
 #endif  /* HATARI_AUDIO_H */