diff -Naur TI-chksum-0.1.orig/ckmain.c TI-chksum-0.1/ckmain.c
--- TI-chksum-0.1.orig/ckmain.c	2005-08-05 21:27:31.000000000 +0200
+++ TI-chksum-0.1/ckmain.c	2007-08-17 20:14:29.000000000 +0200
@@ -11,8 +11,8 @@
 int main(int argc, char **argv)
 {
   FILE *fp;
-  unsigned long sum = 0;
-  unsigned long res = 0;
+  unsigned int sum = 0;
+  unsigned int res = 0;
 
   if(argc != 2)
   {
@@ -27,7 +27,7 @@
     printf("File doesn't contain the checksum, adding\n");
     if(cs_calc_sum(fp, &sum, 0))
     {
-      printf("Calculated checksum is %lX\n", sum);
+      printf("Calculated checksum is %X\n", sum);
       if(cs_set_sum(fp, sum, 0))
         printf("Added successfully\n");
       else
@@ -39,9 +39,9 @@
     printf("File already contains the checksum, verifying\n");
     if(cs_calc_sum(fp, &sum, 1))
     {
-      printf("Calculated checksum is %lX\n", sum);
+      printf("Calculated checksum is %X\n", sum);
       cs_get_sum(fp, &res);
-      printf("Saved checksum is %lX\n", res);
+      printf("Saved checksum is %X\n", res);
       if(sum != res)
         printf("Checksum validation failed!\n");
       else
diff -Naur TI-chksum-0.1.orig/cksum.c TI-chksum-0.1/cksum.c
--- TI-chksum-0.1.orig/cksum.c	2005-08-05 21:27:31.000000000 +0200
+++ TI-chksum-0.1/cksum.c	2007-08-17 20:10:53.000000000 +0200
@@ -4,7 +4,7 @@
 
 #define MAGIC_NUMBER 0xC453DE23
 
-static unsigned long crctab[256] =
+static unsigned int crctab[256] =
 {
   0x0,
   0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B,
@@ -66,24 +66,24 @@
 
   fseek(fp, -8, SEEK_END);
   fread(buf, 8, 1, fp);
-  if(*(unsigned long*)buf == MAGIC_NUMBER)
+  if(*(unsigned int*)buf == MAGIC_NUMBER)
     return 1;
   return 0;
 }
 
-unsigned long cs_read_sum(FILE *fp)
+unsigned int cs_read_sum(FILE *fp)
 {
   char buf[8];
 
   fseek(fp, -8, SEEK_END);
   fread(buf, 8, 1, fp);
-  return *((unsigned long*)&buf[4]);
+  return *((unsigned int*)&buf[4]);
 }
 
-int cs_calc_sum(FILE *fp, unsigned long *res, int tagged)
+int cs_calc_sum(FILE *fp, unsigned int *res, int tagged)
 {
   unsigned char buf[BUFLEN];
-  unsigned long crc = 0;
+  unsigned int crc = 0;
   uintmax_t length = 0;
   size_t bytes_read;
 
@@ -117,9 +117,9 @@
   return 1;
 }
 
-unsigned long cs_calc_buf_sum(char *buf, int size)
+unsigned int cs_calc_buf_sum(char *buf, unsigned long size)
 {
-  unsigned long crc = 0;
+  unsigned int crc = 0;
   char *cp = buf;
   unsigned long length = size;
 
@@ -134,9 +134,9 @@
   return crc;
 }
 
-int cs_set_sum(FILE *fp, unsigned long sum, int tagged)
+int cs_set_sum(FILE *fp, unsigned int sum, int tagged)
 {
-  unsigned long magic = MAGIC_NUMBER;
+  unsigned int magic = MAGIC_NUMBER;
 
   if(tagged)
     fseek(fp, -8, SEEK_END);
@@ -151,9 +151,9 @@
   return 1;
 }
 
-void cs_get_sum(FILE *fp, unsigned long *sum)
+void cs_get_sum(FILE *fp, unsigned int *sum)
 {
-  unsigned long magic = 0;
+  unsigned int magic = 0;
 
   fseek(fp, -8, SEEK_END);
 
diff -Naur TI-chksum-0.1.orig/cksum.h TI-chksum-0.1/cksum.h
--- TI-chksum-0.1.orig/cksum.h	2005-08-05 21:27:31.000000000 +0200
+++ TI-chksum-0.1/cksum.h	2007-08-17 20:14:39.000000000 +0200
@@ -14,10 +14,10 @@
 #include <errno.h>
 
 int cs_is_tagged(FILE*);
-unsigned long cs_read_sum(FILE*);
-int cs_calc_sum(FILE*, unsigned long*, int);
-int cs_set_sum(FILE*, unsigned long, int);
-void cs_get_sum(FILE*, unsigned long*);
-unsigned long cs_calc_buf_sum(char*, int);
+unsigned int cs_read_sum(FILE*);
+int cs_calc_sum(FILE*, unsigned int*, int);
+int cs_set_sum(FILE*, unsigned int, int);
+void cs_get_sum(FILE*, unsigned int*);
+unsigned int cs_calc_buf_sum(char*, unsigned long);
 
 #endif