diff --git a/usr.sbin/mkfs.mfs/const.h b/usr.sbin/mkfs.mfs/const.h
index 863fe20d0..b4c1cd008 100644
--- a/usr.sbin/mkfs.mfs/const.h
+++ b/usr.sbin/mkfs.mfs/const.h
@@ -2,8 +2,6 @@
 #define __MFS_CONST_H__
 
 /* Tables sizes */
-#define V1_NR_DZONES       7	/* # direct zone numbers in a V1 inode */
-#define V1_NR_TZONES       9	/* total # zone numbers in a V1 inode */
 #define V2_NR_DZONES       7	/* # direct zone numbers in a V2 inode */
 #define V2_NR_TZONES      10	/* total # zone numbers in a V2 inode */
 
@@ -82,16 +80,6 @@
 #define FS_BITCHUNK_BITS		(usizeof(uint32_t) * CHAR_BIT)
 #define FS_BITS_PER_BLOCK(b)	(FS_BITMAP_CHUNKS(b) * FS_BITCHUNK_BITS)
 
-/* Derived sizes pertaining to the V1 file system. */
-#define V1_ZONE_NUM_SIZE           usizeof (uint16_t)  /* # bytes in V1 zone  */
-#define V1_INODE_SIZE             usizeof (d1_inode)  /* bytes in V1 dsk ino */
-
-/* # zones/indir block */
-#define V1_INDIRECTS (_STATIC_BLOCK_SIZE/V1_ZONE_NUM_SIZE)  
-
-/* # V1 dsk inodes/blk */
-#define V1_INODES_PER_BLOCK (_STATIC_BLOCK_SIZE/V1_INODE_SIZE)
-
 /* Derived sizes pertaining to the V2 file system. */
 #define V2_ZONE_NUM_SIZE            usizeof (uint32_t)  /* # bytes in V2 zone  */
 #define V2_INODE_SIZE             usizeof (d2_inode)  /* bytes in V2 dsk ino */
diff --git a/usr.sbin/mkfs.mfs/type.h b/usr.sbin/mkfs.mfs/type.h
index 2c65282b1..22e12b102 100644
--- a/usr.sbin/mkfs.mfs/type.h
+++ b/usr.sbin/mkfs.mfs/type.h
@@ -1,16 +1,6 @@
 #ifndef __MFS_TYPE_H__
 #define __MFS_TYPE_H__
 
-/* Declaration of the V1 inode as it is on the disk (not in core). */
-typedef struct {		/* V1.x disk inode */
-  uint16_t d1_mode;		/* file type, protection, etc. */
-  int16_t d1_uid;		/* user id of the file's owner */
-  int32_t d1_size;		/* current file size in bytes */
-  int32_t d1_mtime;		/* when was file data last changed */
-  uint8_t d1_gid;		/* group number */
-  uint8_t d1_nlinks;		/* how many links to this file */
-  uint16_t d1_zone[V1_NR_TZONES];/* block nums for direct, ind, and dbl ind */
-} d1_inode;
 
 /* Declaration of the V2 inode as it is on the disk (not in core). */
 typedef struct {		/* V2.x disk inode */