diff --git a/fluidsynth/src/drivers/fluid_coreaudio.c b/fluidsynth/src/drivers/fluid_coreaudio.c
index b86aac00..d7c22e3b 100644
--- a/fluidsynth/src/drivers/fluid_coreaudio.c
+++ b/fluidsynth/src/drivers/fluid_coreaudio.c
@@ -35,6 +35,7 @@
 #if COREAUDIO_SUPPORT
 #include <CoreServices/CoreServices.h>
 #include <CoreAudio/CoreAudioTypes.h>
+#include <CoreAudio/AudioHardware.h>
 #include <AudioUnit/AudioUnit.h>
 
 /*