--- xmil/sound/opmgenc.c	2004/08/20 12:09:20	1.6
+++ xmil/sound/opmgenc.c	2005/02/04 06:42:12	1.7
@@ -1,4 +1,7 @@
 #include	"compiler.h"
+
+#if defined(SUPPORT_TURBOZ) || defined(SUPPORT_OPM)
+
 #include	<math.h>
 #include	"sound.h"
 #include	"sndctrl.h"
@@ -472,3 +475,5 @@ void opmgen_setreg(REG8 reg, REG8 value)
 	}
 }
 
+#endif
+