diff --git a/src/music/cocoa_m.cpp b/src/music/cocoa_m.cpp
--- a/src/music/cocoa_m.cpp
+++ b/src/music/cocoa_m.cpp
@@ -68,7 +68,7 @@ static void DoSetVolume()
 			 * risk compilation errors. The header AudioComponent.h
 			 * was introduced in 10.6 so use it to decide which
 			 * type definition to use. */
-#ifdef __AUDIOCOMPONENT_H__
+#if defined(AUDIO_UNIT_VERSION) && (AUDIO_UNIT_VERSION >= 1060)
 			AudioComponentDescription desc;
 #else
 			ComponentDescription desc;