diff --git a/disk-utils/cramfs.h b/disk-utils/cramfs.h
index ba4ba7fbc..0ce2cec76 100644
--- a/disk-utils/cramfs.h
+++ b/disk-utils/cramfs.h
@@ -19,9 +19,7 @@
 #ifndef __CRAMFS_H
 #define __CRAMFS_H
 
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned int u32;
+#include <stdint.h>
 
 #define CRAMFS_MAGIC		0x28cd3d45	/* some random number */
 #define CRAMFS_SIGNATURE	"Compressed ROMFS"
@@ -49,9 +47,9 @@ typedef unsigned int u32;
  * Reasonably terse representation of the inode data.
  */
 struct cramfs_inode {
-	u32 mode:16, uid:16;
+	uint32_t mode:16, uid:16;
 	/* SIZE for device files is i_rdev */
-	u32 size:24, gid:8;
+	uint32_t size:24, gid:8;
 	/* NAMELEN is the length of the file name, divided by 4 and
            rounded up.  (cramfs doesn't support hard links.) */
 	/* OFFSET: For symlinks and non-empty regular files, this
@@ -60,28 +58,28 @@ struct cramfs_inode {
 	   see README).  For non-empty directories it is the offset
 	   (divided by 4) of the inode of the first file in that
 	   directory.  For anything else, offset is zero. */
-	u32 namelen:6, offset:26;
+	uint32_t namelen:6, offset:26;
 };
 
 struct cramfs_info {
-        u32 crc;
-        u32 edition;
-        u32 blocks;
-        u32 files;
+        uint32_t crc;
+        uint32_t edition;
+        uint32_t blocks;
+        uint32_t files;
 };
 
 /*
  * Superblock information at the beginning of the FS.
  */
 struct cramfs_super {
-	u32 magic;		/* 0x28cd3d45 - random number */
-	u32 size;		/* Not used.  mkcramfs currently
+	uint32_t magic;		/* 0x28cd3d45 - random number */
+	uint32_t size;		/* Not used.  mkcramfs currently
                                    writes a constant 1<<16 here. */
-	u32 flags;		/* 0 */
-	u32 future;		/* 0 */
-	u8 signature[16];	/* "Compressed ROMFS" */
+	uint32_t flags;		/* 0 */
+	uint32_t future;		/* 0 */
+	uint8_t signature[16];	/* "Compressed ROMFS" */
 	struct cramfs_info fsid;/* unique filesystem info */
-	u8 name[16];		/* user-defined name */
+	uint8_t name[16];		/* user-defined name */
 	struct cramfs_inode root;	/* Root inode data */
 };
 
@@ -103,7 +101,7 @@ int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen);
 int cramfs_uncompress_init(void);
 int cramfs_uncompress_exit(void);
 
-u32 u32_toggle_endianness(int big_endian, u32 what);
+uint32_t u32_toggle_endianness(int big_endian, uint32_t what);
 void super_toggle_endianness(int from_big_endian, struct cramfs_super *super);
 void inode_to_host(int from_big_endian, struct cramfs_inode *inode_in, struct cramfs_inode *inode_out);
 void inode_from_host(int to_big_endian, struct cramfs_inode *inode_in, struct cramfs_inode *inode_out);
diff --git a/disk-utils/cramfs_common.c b/disk-utils/cramfs_common.c
index c76dbd1cf..f4a257dd0 100644
--- a/disk-utils/cramfs_common.c
+++ b/disk-utils/cramfs_common.c
@@ -20,7 +20,7 @@
 #include "cramfs.h"
 #include "../include/bitops.h"
 
-u32 u32_toggle_endianness(int big_endian, u32 what)
+uint32_t u32_toggle_endianness(int big_endian, uint32_t what)
 {
 	return big_endian == HOST_IS_BIG_ENDIAN ? what : swab32(what);
 }
diff --git a/disk-utils/fsck.cramfs.c b/disk-utils/fsck.cramfs.c
index 3d0c3e5f1..d615a953a 100644
--- a/disk-utils/fsck.cramfs.c
+++ b/disk-utils/fsck.cramfs.c
@@ -38,6 +38,7 @@
 
 #include <stdio.h>
 #include <stdarg.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <stdlib.h>
@@ -139,7 +140,7 @@ static void die(int status, int syserr, const char *fmt, ...)
 	exit(status);
 }
 
-int get_superblock_endianness(u32 magic)
+int get_superblock_endianness(uint32_t magic)
 {
 	if (magic == CRAMFS_MAGIC) {
 		cramfs_is_big_endian = HOST_IS_BIG_ENDIAN;
@@ -236,7 +237,7 @@ static void test_super(int *start, size_t *length) {
 static void test_crc(int start)
 {
 	void *buf;
-	u32 crc;
+	uint32_t crc;
 
 	if (!(super.flags & CRAMFS_FLAG_FSID_VERSION_2)) {
 #ifdef INCLUDE_FS_TESTS
@@ -402,7 +403,7 @@ static void do_uncompress(char *path, int fd, unsigned long offset, unsigned lon
 
 	do {
 		unsigned long out = page_size;
-		unsigned long next = u32_toggle_endianness(cramfs_is_big_endian, *(u32 *) romfs_read(offset));
+		unsigned long next = u32_toggle_endianness(cramfs_is_big_endian, *(uint32_t *) romfs_read(offset));
 
 		if (next > end_data) {
 			end_data = next;
@@ -563,7 +564,7 @@ static void do_symlink(char *path, struct cramfs_inode *i)
 {
 	unsigned long offset = i->offset << 2;
 	unsigned long curr = offset + 4;
-	unsigned long next = u32_toggle_endianness(cramfs_is_big_endian, *(u32 *) romfs_read(offset));
+	unsigned long next = u32_toggle_endianness(cramfs_is_big_endian, *(uint32_t *) romfs_read(offset));
 	unsigned long size;
 
 	if (offset == 0) {
diff --git a/disk-utils/mkfs.cramfs.c b/disk-utils/mkfs.cramfs.c
index 6767ba3c3..0bfd1370c 100644
--- a/disk-utils/mkfs.cramfs.c
+++ b/disk-utils/mkfs.cramfs.c
@@ -634,7 +634,7 @@ do_compress(char *base, unsigned int offset, unsigned char const *name,
 			exit(MKFS_ERROR);
 		}
 
-		*(u32 *) (base + offset) = u32_toggle_endianness(cramfs_is_big_endian, curr);
+		*(uint32_t *) (base + offset) = u32_toggle_endianness(cramfs_is_big_endian, curr);
 		offset += 4;
 	} while (size);
 
@@ -736,7 +736,7 @@ int main(int argc, char **argv)
 	loff_t fslen_ub = sizeof(struct cramfs_super);
 	unsigned int fslen_max;
 	char const *dirname, *outfile;
-	u32 crc = crc32(0L, Z_NULL, 0);
+	uint32_t crc = crc32(0L, Z_NULL, 0);
 	int c;
 	cramfs_is_big_endian = HOST_IS_BIG_ENDIAN; /* default is to use host order */