diff --git a/sys/sys/dkio.h b/sys/sys/dkio.h
index 83467072ae1d..78834d97c2a3 100644
--- a/sys/sys/dkio.h
+++ b/sys/sys/dkio.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: dkio.h,v 1.18 2012/10/19 17:09:07 drochner Exp $	*/
+/*	$NetBSD: dkio.h,v 1.19 2014/07/25 08:34:48 dholland Exp $	*/
 
 /*
  * Copyright (c) 1987, 1988, 1993
@@ -109,15 +109,7 @@
 
 #define	DIOCTUR		_IOR('d', 128, int)	/* test unit ready */
 
-struct disk_discard_params {
-	long maxsize; /* in DEV_BSIZE units */
-};
-#define DIOCGDISCARDPARAMS _IOR('d', 129, struct disk_discard_params)
-
-struct disk_discard_range {
-	daddr_t bno;
-	long size;
-};
-#define DIOCDISCARD	_IOW('d', 130, struct disk_discard_range)
+/* 129 was DIOCGDISCARDPARAMS during 6.99 */
+/* 130 was DIOCDISCARD during 6.99 */
 
 #endif /* _SYS_DKIO_H_ */