diff --git a/libisoburn/isoburn.c b/libisoburn/isoburn.c
index e16a3f09..51805f28 100644
--- a/libisoburn/isoburn.c
+++ b/libisoburn/isoburn.c
@@ -456,6 +456,7 @@ int isoburn_prepare_disc_aux(struct burn_drive *in_d, struct burn_drive *out_d,
    isoburn_report_iso_error(ret, "Cannot create iso_write_opts", 0, "FATAL",0);
    goto ex;
  }
+ iso_write_opts_set_will_cancel(wopts, opts->will_cancel);
  iso_write_opts_set_iso_level(wopts, opts->level);
  iso_write_opts_set_rockridge(wopts, opts->rockridge);
  iso_write_opts_set_joliet(wopts, opts->joliet);
@@ -994,6 +995,7 @@ int isoburn_igopt_set_extensions(struct isoburn_imgen_opts *o, int ext)
  o->session_md5= !!(ext & 64);
  o->file_md5= (ext & (128 | 256)) >> 7;
  o->no_emul_toc= !!(ext & 512);
+ o->will_cancel= !!(ext & 1024);
  return(1);
 }
 
@@ -1003,7 +1005,7 @@ int isoburn_igopt_get_extensions(struct isoburn_imgen_opts *o, int *ext)
  *ext= (!!o->rockridge) | ((!!o->joliet)<<1) | ((!!o->iso1999)<<2) |
        ((!!o->hardlinks) << 3) | ((!!o->aaip) << 5) |
        ((!!o->session_md5) << 6) | ((o->file_md5 & 3) << 7) |
-       ((!!o->no_emul_toc) << 9);
+       ((!!o->no_emul_toc) << 9) | ((o->will_cancel) << 10);
  return(1);
 }
 
diff --git a/libisoburn/isoburn.h b/libisoburn/isoburn.h
index 00acfed1..0304cb37 100644
--- a/libisoburn/isoburn.h
+++ b/libisoburn/isoburn.h
@@ -345,6 +345,8 @@ struct isoburn_imgen_opts {
 
     /* Options for image generation */
 
+    int will_cancel :1;
+
     int level;  /**< ISO level to write at. */
     
     /** Which extensions to support. */
diff --git a/libisoburn/libisoburn.h b/libisoburn/libisoburn.h
index 98444dc2..c1fa094c 100644
--- a/libisoburn/libisoburn.h
+++ b/libisoburn/libisoburn.h
@@ -974,6 +974,12 @@ int isoburn_igopt_get_level(struct isoburn_imgen_opts *o, int *level);
                  the first session to LBA 32 and do not copy the first 64kB
                  of the first session to LBA 0, but rather write the first
                  session to LBA 0 directly.
+          bit10= will_cancel
+                 @since 0.6.6
+                 Announce to libisofs that only the image size is desired
+                 and that the write thread will be cancelled by
+                 isoburn_cancel_prepared_write() before actual image writing
+                 occurs. Without this, cancellation can cause a MISHAP event.
     @return 1 success, <=0 failure
 */
 #define isoburn_igopt_rockridge         1
@@ -985,6 +991,7 @@ int isoburn_igopt_get_level(struct isoburn_imgen_opts *o, int *level);
 #define isoburn_igopt_file_md5        128
 #define isoburn_igopt_file_stability  256
 #define isoburn_igopt_no_emul_toc     512
+#define isoburn_igopt_will_cancel    1024
 int isoburn_igopt_set_extensions(struct isoburn_imgen_opts *o, int ext);
 int isoburn_igopt_get_extensions(struct isoburn_imgen_opts *o, int *ext);
 
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index ce6105ae..e60c67e1 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2010.11.23.200346"
+#define Xorriso_timestamP "2010.11.24.100845"