diff --git a/drivers/coreaudio/audio_driver_coreaudio.h b/drivers/coreaudio/audio_driver_coreaudio.h
index 1ef474ac196..98919202630 100644
--- a/drivers/coreaudio/audio_driver_coreaudio.h
+++ b/drivers/coreaudio/audio_driver_coreaudio.h
@@ -56,9 +56,11 @@ class AudioDriverCoreAudio : public AudioDriver {
 
 	Vector<int32_t> samples_in;
 
+#ifdef OSX_ENABLED
 	static OSStatus output_device_address_cb(AudioObjectID inObjectID,
 			UInt32 inNumberAddresses, const AudioObjectPropertyAddress *inAddresses,
 			void *inClientData);
+#endif
 
 	static OSStatus output_callback(void *inRefCon,
 			AudioUnitRenderActionFlags *ioActionFlags,