diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index d954a766..d48a8611 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2009.10.05.183619"
+#define Xorriso_timestamP "2009.10.05.190215"
diff --git a/xorriso/xorrisoburn.c b/xorriso/xorrisoburn.c
index 5124f911..814c8c38 100644
--- a/xorriso/xorrisoburn.c
+++ b/xorriso/xorrisoburn.c
@@ -1233,6 +1233,22 @@ int Xorriso_aquire_drive(struct XorrisO *xorriso, char *adr, int flag)
  Sfile_str(xorriso->publisher,
            (char *) un0(iso_image_get_publisher_id(volset)), 0);
 
+ /* <<< can be removed as soon as libisofs-0.6.24 is mandatory
+ */
+ if(strcmp(un0(iso_image_get_copyright_file_id(volset)), "_") == 0 &&
+    strcmp(un0(iso_image_get_abstract_file_id(volset)), "_") == 0 &&
+    strcmp(un0(iso_image_get_biblio_file_id(volset)), "_") == 0) {
+   /* This is bug output from libisofs <= 0.6.23 . The texts mean file names
+      and should have been empty to indicate that there are no such files.
+      It is obvious that not all three roles can be fulfilled by one file "_"
+      so that one cannot spoil anything by assuming them empty now.
+      Modern versions of libisofs are supposed to do this themselves.
+    */
+   iso_image_set_copyright_file_id(volset, "");
+   iso_image_set_abstract_file_id(volset, "");
+   iso_image_set_biblio_file_id(volset, "");
+ }
+
  if(xorriso->out_drive_handle != NULL &&
     xorriso->out_drive_handle != xorriso->in_drive_handle) {
    ret= Xorriso_get_drive_handles(xorriso, &out_dinfo, &out_drive,