diff --git a/libisoburn/isofs_wrap.c b/libisoburn/isofs_wrap.c
index c1c172aa..058e5eb2 100644
--- a/libisoburn/isofs_wrap.c
+++ b/libisoburn/isofs_wrap.c
@@ -167,22 +167,29 @@ int isoburn_make_iso_read_opts(struct burn_drive *d,
                                struct isoburn_read_opts *read_opts,
                                IsoReadOpts **ropts)
 {
- int ret, int_num, dummy;
+ int ret, int_num;
+ off_t off_t_num, dummy;
  uint32_t ms_block;
  char *msg= NULL;
 
  msg= calloc(1, 160);
  *ropts= NULL;
 
- ret = isoburn_disc_get_msc1(d, &int_num);
+ ret = isoburn_disc_get_msc1_v2(d, &off_t_num);
  if (ret <= 0)
    {ret= -2; goto ex;}
- ms_block= int_num;
+ if(off_t_num > 0xffffffff) {
+   sprintf(msg, "Start address is outside 32 bit range.");
+   isoburn_msgs_submit(o, 0x00060000, msg, 0, "FAILURE", 0);
+   {ret= 0; goto ex;}
+ }
+ ms_block= off_t_num;
  if (o != NULL)
    o->image_start_lba= ms_block;
- ret = isoburn_read_iso_head(d, int_num, &dummy, NULL, 0);
+ ret = isoburn_read_iso_head_v2(d, off_t_num, &dummy, NULL, 0);
  if (ret <= 0) {
-   sprintf(msg, "No ISO 9660 image at LBA %d.", int_num);
+   sprintf(msg, "No ISO 9660 image at LBA %lu.",
+                (unsigned long int) ms_block);
    isoburn_msgs_submit(o, 0x00060000, msg, 0, "WARNING", 0);
    {ret= 2; goto ex;}
  }
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 8446b54d..e79ab9d6 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2024.03.10.111205"
+#define Xorriso_timestamP "2024.03.10.112148"