diff --git a/test/compare_file.c b/test/compare_file.c
index 87a55912..d27f740e 100644
--- a/test/compare_file.c
+++ b/test/compare_file.c
@@ -103,6 +103,7 @@ int Compare_2_files(char *adr1, char *adr2, char *adrc, int flag)
  int ret, differs= 0, r1, r2, fd1= -1, fd2= -1, i, done;
  char buf1[4096], buf2[4096], a[4096], ttx1[40], ttx2[40];
  off_t r1count= 0, r2count= 0, diffcount= 0, first_diff= -1;
+ double dcount;
 
  ret= lstat(adr1, &s1);
  if(ret==-1) {
@@ -241,9 +242,13 @@ int Compare_2_files(char *adr1, char *adr2, char *adrc, int flag)
    if(diffcount>0 || r1count!=r2count) {
      if(first_diff<0)
        first_diff= (r1count>r2count ? r2count : r1count);
+     if(r1count > r2count)
+       dcount= diffcount + (r1count - r2count);
+     else
+       dcount= diffcount + (r2count - r1count);
      printf("%s : %s  :  differs by at least %.f bytes. First at %.f\n", a,
             (s1.st_mtime==s2.st_mtime ?  "CONTENT":"content"),
-            (double) (diffcount + abs(r1count-r2count)), (double) first_diff);
+            dcount, (double) first_diff);
      differs= 1;
    }
  }
diff --git a/xorriso/cmp_update.c b/xorriso/cmp_update.c
index a9f61ad1..3fbdbd58 100644
--- a/xorriso/cmp_update.c
+++ b/xorriso/cmp_update.c
@@ -62,6 +62,7 @@ int Xorriso_compare_2_contents(struct XorrisO *xorriso, char *common_adr,
  char disk_md5[16], iso_md5[16];
  void *ctx= NULL;
  int buf_size= 32 * 1024;
+ double dcount;
 
  Xorriso_alloc_meM(buf1, char, buf_size);
  Xorriso_alloc_meM(buf2, char, buf_size);
@@ -238,10 +239,13 @@ cannot_address:;
    offset_text[0]= 0;
    if(offset>0)
      sprintf(offset_text, "%.f+", (double) offset);
+   if(r1count > r2count)
+     dcount= diffcount + (r1count - r2count);
+   else
+     dcount= diffcount + (r2count - r1count);
    sprintf(respt, "%s %s  :  differs by at least %.f bytes. First at %s%.f\n",
            common_adr, (flag&1 ?  "CONTENT": "content"),
-           (double) (diffcount + abs(r1count-r2count)),
-           offset_text, (double) first_diff);
+           dcount, offset_text, (double) first_diff);
    if(!(flag&(1<<31)))
      Xorriso_result(xorriso,0);
    (*result)|= (1<<15);
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 5b707029..f4b8f6e3 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2019.07.24.141555"
+#define Xorriso_timestamP "2019.08.12.152719"