diff --git a/util-linux/freeramdisk.c b/util-linux/freeramdisk.c
index 1f010c721..c959158c9 100644
--- a/util-linux/freeramdisk.c
+++ b/util-linux/freeramdisk.c
@@ -18,8 +18,6 @@
 #include <unistd.h>
 #include "busybox.h"
 
-/* From linux/fs.h */
-#define BLKFLSBUF  _IO(0x12,97)
 /* From <linux/fd.h> */
 #define FDFLUSH  _IO(2,0x4b)
 
diff --git a/util-linux/fsck_minix.c b/util-linux/fsck_minix.c
index a9c4467d8..f958bdfc9 100644
--- a/util-linux/fsck_minix.c
+++ b/util-linux/fsck_minix.c
@@ -98,9 +98,6 @@
 #include <sys/param.h>
 #include "busybox.h"
 
-#define BLOCK_SIZE_BITS 10
-#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
-
 /*
  * This is the original minix inode layout on disk.
  * Note the 8-bit gid and atime and ctime.
diff --git a/util-linux/mkfs_minix.c b/util-linux/mkfs_minix.c
index d9388b1d7..7f52b563e 100644
--- a/util-linux/mkfs_minix.c
+++ b/util-linux/mkfs_minix.c
@@ -151,9 +151,6 @@ struct minix_dir_entry {
 	char name[0];
 };
 
-#define BLOCK_SIZE_BITS 10
-#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
-
 #define NAME_MAX         255   /* # chars in a file name */
 
 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
diff --git a/util-linux/mkswap.c b/util-linux/mkswap.c
index 0054eca24..b48d1f036 100644
--- a/util-linux/mkswap.c
+++ b/util-linux/mkswap.c
@@ -35,24 +35,14 @@
  *
  */
 
-#include <stdio.h>
+#include "busybox.h"
 #include <unistd.h>
 #include <string.h>
 #include <fcntl.h>
-#include <stdlib.h>
 #include <sys/ioctl.h>			/* for _IO */
 #include <sys/utsname.h>
 #include <asm/page.h>			/* for PAGE_SIZE and PAGE_SHIFT */
 				/* we also get PAGE_SIZE via getpagesize() */
-#include "busybox.h"
-
-#ifndef _IO
-/* pre-1.3.45 */
-enum { BLKGETSIZE = 0x1260 };
-#else
-/* same on i386, m68k, arm; different on alpha, mips, sparc, ppc */
-#define BLKGETSIZE _IO(0x12,96)
-#endif
 
 static char *device_name = NULL;
 static int DEV = -1;