diff --git a/sys/sys/cdio.h b/sys/sys/cdio.h
index b204548e517..a3eb271a751 100644
--- a/sys/sys/cdio.h
+++ b/sys/sys/cdio.h
@@ -274,13 +274,4 @@ struct ioc_capability {			/*<2>*/
 
 #define	CDIOCCAPABILITY	_IOR('c',30,struct ioc_capability)	/*<2>*/
 
-struct ioc_read_audio {
-	u_char address_format;
-	union msf_lba address;
-	int nframes;
-	u_char* buffer;
-};
-
-#define CDIOCREADAUDIO _IOWR('c',31,struct ioc_read_audio)
-
 #endif /* !_SYS_CDIO_H_ */