diff -Nru cvs-1.12.13.orig/src/update.c cvs-1.12.13/src/update.c
--- cvs-1.12.13.orig/src/update.c	2005-09-22 20:49:17.000000000 +0200
+++ cvs-1.12.13/src/update.c	2006-12-15 01:35:54.000000000 +0100
@@ -58,7 +58,7 @@
 static int patch_file (struct file_info *finfo,
                        Vers_TS *vers_ts, 
                        int *docheckout, struct stat *file_info,
-                       unsigned char *checksum);
+                       md5_uint32 *checksum);
 static void patch_file_write (void *, const char *, size_t);
 #endif
 static int merge_file (struct file_info *finfo, Vers_TS *vers);
@@ -723,7 +723,7 @@
 		{
 		    int docheckout;
 		    struct stat file_info;
-		    unsigned char checksum[16];
+		    md5_uint32 checksum[4];
 
 		    retval = patch_file (finfo,
 					 vers, &docheckout,
@@ -1511,7 +1511,7 @@
  */
 static int
 patch_file (struct file_info *finfo, Vers_TS *vers_ts, int *docheckout,
-	    struct stat *file_info, unsigned char *checksum)
+	    struct stat *file_info, md5_uint32 *checksum)
 {
     char *backup;
     char *file1;