diff --git a/commands/autopart/autopart.c b/commands/autopart/autopart.c
index e07022c51..c6fd7112c 100644
--- a/commands/autopart/autopart.c
+++ b/commands/autopart/autopart.c
@@ -229,13 +229,6 @@ void *alloc(size_t n)
 	return m;
 }
 
-#ifndef makedev		/* Missing in sys/types.h */
-#define minor(dev)	(((dev) >> MINOR) & BYTE)
-#define major(dev)	(((dev) >> MAJOR) & BYTE)
-#define makedev(major, minor)	\
-			((dev_t) (((major) << MAJOR) | ((minor) << MINOR)))
-#endif
-
 typedef enum parttype { DUNNO, SUBPART, PRIMARY, FLOPPY } parttype_t;
 
 typedef struct device {
diff --git a/commands/fsck.mfs/fsck.c b/commands/fsck.mfs/fsck.c
index 63513eb25..8b1abd099 100644
--- a/commands/fsck.mfs/fsck.c
+++ b/commands/fsck.mfs/fsck.c
@@ -958,8 +958,7 @@ void list(ino_t ino, d_inode *ip)
   switch (ip->i_mode & I_TYPE) {
       case I_CHAR_SPECIAL:
       case I_BLOCK_SPECIAL:
-	printf("  %2x,%2x ", (dev_t) ip->i_zone[0] >> MAJOR & 0xFF,
-	       (dev_t) ip->i_zone[0] >> MINOR & 0xFF);
+	printf("  %2x,%2x ", major(ip->i_zone[0]), minor(ip->i_zone[0]));
 	break;
       default:	printf("%7ld ", ip->i_size);
   }
diff --git a/commands/part/part.c b/commands/part/part.c
index 18b3ee53a..eba6496db 100644
--- a/commands/part/part.c
+++ b/commands/part/part.c
@@ -200,13 +200,6 @@ void *alloc(size_t n)
 	return m;
 }
 
-#ifndef makedev		/* Missing in sys/types.h */
-#define minor(dev)	(((dev) >> MINOR) & BYTE)
-#define major(dev)	(((dev) >> MAJOR) & BYTE)
-#define makedev(major, minor)	\
-			((dev_t) (((major) << MAJOR) | ((minor) << MINOR)))
-#endif
-
 typedef enum parttype { DUNNO, SUBPART, PRIMARY, FLOPPY } parttype_t;
 
 typedef struct device {
diff --git a/commands/partition/partition.c b/commands/partition/partition.c
index be790d5b1..5b3a7b2fc 100644
--- a/commands/partition/partition.c
+++ b/commands/partition/partition.c
@@ -36,13 +36,6 @@ void fatal(const char *label)
 	exit(1);
 }
 
-#ifndef makedev
-#define minor(dev)	(((dev) >> MINOR) & BYTE)
-#define major(dev)	(((dev) >> MAJOR) & BYTE)
-#define makedev(major, minor)	\
-			((dev_t) (((major) << MAJOR) | ((minor) << MINOR)))
-#endif
-
 int aflag;			/* Add a new partition to the current table. */
 int mflag;			/* Minix rules, no need for alignment. */
 int rflag;			/* Report current partitions. */
diff --git a/commands/repartition/repartition.c b/commands/repartition/repartition.c
index b3966d5ad..ba929f281 100644
--- a/commands/repartition/repartition.c
+++ b/commands/repartition/repartition.c
@@ -44,13 +44,6 @@ void fatal(const char *label)
 	exit(1);
 }
 
-#ifndef makedev
-#define minor(dev)	(((dev) >> MINOR) & BYTE)
-#define major(dev)	(((dev) >> MAJOR) & BYTE)
-#define makedev(major, minor)	\
-			((dev_t) (((major) << MAJOR) | ((minor) << MINOR)))
-#endif
-
 #define MINOR_d0p0s0	128
 
 void partsort(struct part_entry *pe)
diff --git a/commands/service/service.c b/commands/service/service.c
index 3f8cadf67..65fe1998f 100644
--- a/commands/service/service.c
+++ b/commands/service/service.c
@@ -307,7 +307,7 @@ static int parse_arguments(int argc, char **argv, u32_t *rss_flags)
 				  print_usage(argv[ARG_NAME], "major already set");
 				  exit(EINVAL);
 			  }
-              req_major = (stat_buf.st_rdev >> MAJOR) & BYTE;
+              req_major = major(stat_buf.st_rdev);
               if(req_dev_style == STYLE_NDEV) {
                   req_dev_style = STYLE_DEV;
               }
diff --git a/servers/mfs/inode.c b/servers/mfs/inode.c
index 1ad314c6c..e04b118c4 100644
--- a/servers/mfs/inode.c
+++ b/servers/mfs/inode.c
@@ -275,8 +275,8 @@ struct inode *alloc_inode(dev_t dev, mode_t bits)
   b = alloc_bit(sp, IMAP, sp->s_isearch);
   if (b == NO_BIT) {
 	err_code = ENOSPC;
-	major = (int) (sp->s_dev >> MAJOR) & BYTE;
-	minor = (int) (sp->s_dev >> MINOR) & BYTE;
+	major = major(sp->s_dev);
+	minor = minor(sp->s_dev);
 	printf("Out of i-nodes on device %d/%d\n", major, minor);
 	return(NULL);
   }
diff --git a/sys/sys/types.h b/sys/sys/types.h
index d7c8ffb86..74abeecc7 100644
--- a/sys/sys/types.h
+++ b/sys/sys/types.h
@@ -133,7 +133,6 @@ typedef uint32_t bitchunk_t; /* collection of bits in a bitmap */
  */
 
 typedef unsigned long  Ino_t;
-
 #endif /* __minix */
 
 #include <machine/endian.h>
@@ -301,13 +300,13 @@ typedef int32_t __devmajor_t, __devminor_t;
 #define devmajor_t __devmajor_t
 #define devminor_t __devminor_t
 #define NODEVMAJOR (-1)
-/* Major, minor numbers, dev_t's. */
-#define MAJOR              8    /* major device = (dev>>MAJOR) & 0377 */
-#define MINOR              0    /* minor device = (dev>>MINOR) & 0377 */
-#define minor(dev)      ((devminor_t)(((dev) >> MINOR) & 0xff))
-#define major(dev)      ((devmajor_t)(((dev) >> MAJOR) & 0xff))
-#define makedev(major, minor)   \
-                        ((dev_t) (((major) << MAJOR) | ((minor) << MINOR)))
+/* LSC Our major / minor numbering scheme is not the exactly the same, to be updated? */
+#define	major(x)	((devmajor_t)(((uint32_t)(x) & 0x0000ff00) >>  8))
+#define	minor(x)	((devminor_t)( \
+				   (((uint32_t)(x) & 0x000000ff) >>  0)))
+#define	makedev(x,y)	((dev_t)((((x) <<  8) & 0x0000ff00) | \
+				  \
+				 (((y) <<  0) & 0x000000ff)))
 #endif
 
 #ifdef	_BSD_CLOCK_T_