4 files changed, 8 insertions, 6 deletions
diff --git a/src/audioOutputs/audioOutput_ao.c b/src/audioOutputs/audioOutput_ao.c
index 65ffa2c27..e7e201add 100644
--- a/src/audioOutputs/audioOutput_ao.c
+++ b/src/audioOutputs/audioOutput_ao.c
@@ -158,7 +158,7 @@ static void audioOutputAo_finishDriver(AudioOutput * audioOutput)
 		ao_shutdown();
 }
 
-static void audioOutputAo_dropBufferedAudio(AudioOutput * audioOutput)
+static void audioOutputAo_dropBufferedAudio(mpd_unused AudioOutput * audioOutput)
 {
 	/* not supported by libao */
 }
diff --git a/src/audioOutputs/audioOutput_jack.c b/src/audioOutputs/audioOutput_jack.c
index ed0bceb46..c8aa4dcb6 100644
--- a/src/audioOutputs/audioOutput_jack.c
+++ b/src/audioOutputs/audioOutput_jack.c
@@ -102,7 +102,7 @@ static void jack_finishDriver(AudioOutput *audioOutput)
 	freeJackData(audioOutput);
 }
 
-static int srate(jack_nframes_t rate, void *data)
+static int srate(mpd_unused jack_nframes_t rate, void *data)
 {
 	JackData *jd = (JackData *) ((AudioOutput*) data)->data;
  	AudioFormat *audioFormat = &(((AudioOutput*) data)->outAudioFormat);
@@ -366,7 +366,7 @@ static void jack_closeDevice(AudioOutput * audioOutput)
 	DEBUG("jack_closeDevice (pid=%d)\n", getpid());
 }
 
-static void jack_dropBufferedAudio (AudioOutput * audioOutput)
+static void jack_dropBufferedAudio (mpd_unused AudioOutput * audioOutput)
 {
 }
 
diff --git a/src/audioOutputs/audioOutput_null.c b/src/audioOutputs/audioOutput_null.c
index 37ff7194a..d63004645 100644
--- a/src/audioOutputs/audioOutput_null.c
+++ b/src/audioOutputs/audioOutput_null.c
@@ -19,7 +19,8 @@
 #include "../audioOutput.h"
 #include "../timer.h"
 
-static int null_initDriver(AudioOutput *audioOutput, ConfigParam *param)
+static int null_initDriver(AudioOutput *audioOutput,
+			   mpd_unused ConfigParam *param)
 {
 	audioOutput->data = NULL;
 	return 0;
@@ -43,7 +44,7 @@ static void null_closeDevice(AudioOutput *audioOutput)
 }
 
 static int null_playAudio(AudioOutput *audioOutput,
-			  const char *playChunk, size_t size)
+			  mpd_unused const char *playChunk, size_t size)
 {
 	Timer *timer = audioOutput->data;
 
diff --git a/src/audioOutputs/audioOutput_oss.c b/src/audioOutputs/audioOutput_oss.c
index 2a6a4876b..2df7d5728 100644
--- a/src/audioOutputs/audioOutput_oss.c
+++ b/src/audioOutputs/audioOutput_oss.c
@@ -334,7 +334,8 @@ static int oss_testDefault(void)
 	return -1;
 }
 
-static int oss_open_default(AudioOutput *ao, ConfigParam *param, OssData *od)
+static int oss_open_default(mpd_unused AudioOutput *ao, ConfigParam *param,
+			    OssData *od)
 {
 	int i;
 	int err[ARRAY_SIZE(default_devices)];