diff --git a/src/copyin.c b/src/copyin.c

index 09f226b..d505407 100644

--- a/src/copyin.c

+++ b/src/copyin.c

@@ -178,7 +178,7 @@ list_file(struct cpio_file_stat* file_hdr, int in_file_des)

 #endif

       if (crc != file_hdr->c_chksum)

 	{

-	  error (0, 0, _("%s: checksum error (0x%lx, should be 0x%lx)"),

+	  error (0, 0, _("%s: checksum error (0x%x, should be 0x%x)"),

 		 file_hdr->c_name, crc, file_hdr->c_chksum);

 	}

     }

@@ -525,7 +525,7 @@ copyin_regular_file (struct cpio_file_stat* file_hdr, int in_file_des)

       if (archive_format == arf_crcascii)

 	{

 	  if (crc != file_hdr->c_chksum)

-	    error (0, 0, _("%s: checksum error (0x%lx, should be 0x%lx)"),

+	    error (0, 0, _("%s: checksum error (0x%x, should be 0x%x)"),

 		   file_hdr->c_name, crc, file_hdr->c_chksum);

 	}

       tape_skip_padding (in_file_des, file_hdr->c_filesize);

@@ -550,7 +550,7 @@ copyin_regular_file (struct cpio_file_stat* file_hdr, int in_file_des)

   if (archive_format == arf_crcascii)

     {

       if (crc != file_hdr->c_chksum)

-	error (0, 0, _("%s: checksum error (0x%lx, should be 0x%lx)"),

+	error (0, 0, _("%s: checksum error (0x%x, should be 0x%x)"),

 	       file_hdr->c_name, crc, file_hdr->c_chksum);

     }

@@ -1442,7 +1442,7 @@ process_copy_in ()

 	    tape_skip_padding (in_file_des, file_hdr.c_filesize);

 	    if (crc != file_hdr.c_chksum)

 	      {

-		error (0, 0, _("%s: checksum error (0x%lx, should be 0x%lx)"),

+		error (0, 0, _("%s: checksum error (0x%x, should be 0x%x)"),

 		       file_hdr.c_name, crc, file_hdr.c_chksum);

 	      }

          /* Debian hack: -v and -V now work with --only-verify-crc.

diff --git a/src/copyout.c b/src/copyout.c

index 72f1989..03eaf88 100644

--- a/src/copyout.c

+++ b/src/copyout.c

@@ -33,10 +33,10 @@

 /* Read FILE_SIZE bytes of FILE_NAME from IN_FILE_DES and

    compute and return a checksum for them.  */

-static unsigned long

+static uint32_t

 read_for_checksum (int in_file_des, int file_size, char *file_name)

 {

-  unsigned long crc;

+  uint32_t crc;

   char buf[BUFSIZ];

   int bytes_left;

   int bytes_read;

diff --git a/src/cpiohdr.h b/src/cpiohdr.h

index bb1ad6b..1c11998 100644

--- a/src/cpiohdr.h

+++ b/src/cpiohdr.h

@@ -123,7 +123,7 @@ struct cpio_file_stat /* Internal representation of a CPIO header */

   long c_rdev_maj;

   long c_rdev_min;

   size_t c_namesize;

-  unsigned long c_chksum;

+  uint32_t c_chksum;

   char *c_name;

   char *c_tar_linkname;

 };

diff --git a/src/extern.h b/src/extern.h

index 4f94d40..3530bf6 100644

--- a/src/extern.h

+++ b/src/extern.h

@@ -75,7 +75,7 @@ extern char *new_media_message_after_number;

 extern int archive_des;

 extern char *archive_name;

 extern char *rsh_command_option;

-extern unsigned long crc;

+extern uint32_t crc;

 extern int delayed_seek_count;

 #ifdef DEBUG_CPIO

 extern int debug_flag;

diff --git a/src/global.c b/src/global.c

index cff9720..336941e 100644

--- a/src/global.c

+++ b/src/global.c

@@ -144,7 +144,7 @@ char *archive_name = NULL;

 char *rsh_command_option = NULL;

 /* CRC checksum.  */

-unsigned long crc;

+uint32_t crc;

 /* Input and output buffers.  */

 char *input_buffer, *output_buffer;