diff --git a/sys/sys/diskslice.h b/sys/sys/diskslice.h
index 1033c3f75bc1..0e439eac32e0 100644
--- a/sys/sys/diskslice.h
+++ b/sys/sys/diskslice.h
@@ -29,14 +29,6 @@
 #ifndef	_SYS_DISKSLICE_H_
 #define	_SYS_DISKSLICE_H_
 
-#ifndef raidframe_has_been_fixed
-#ifdef _KERNEL
-#include <sys/ioccom.h>
-#define	DIOCGSLICEINFO		_IOR('d', 111, struct diskslices)
-#define	DIOCSYNCSLICEINFO	_IOW('d', 112, int)
-#endif
-#endif
-
 #ifndef sys_boot_code_has_been_fixed
 #define	BASE_SLICE		2
 #define	COMPATIBILITY_SLICE	0