diff --git a/ChangeLog b/ChangeLog
index bc19d34..68fce85 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 bzr branch lp:libisofs/for-libisoburn (to become libisofs-1.3.0.tar.gz)
 ===============================================================================
-- no novelties yet -
+* Bug fix: Unspecified Expiration Time and Effective Time of ISO volume was
+           represented by 0-bytes rather than ASCII '0' digits.
 
 
 libisofs-1.2.8.tar.gz Mon Mar 18 2013
diff --git a/libisofs/ecma119.c b/libisofs/ecma119.c
index eb0041a..fa94348 100644
--- a/libisofs/ecma119.c
+++ b/libisofs/ecma119.c
@@ -501,13 +501,23 @@ void ecma119_set_voldescr_times(IsoImageWriter *writer,
     else
         iso_datetime_17(vol->vol_modification_time, t->now, t->always_gmt);
 
-    if (t->vol_expiration_time > 0)
+    if (t->vol_expiration_time > 0) {
         iso_datetime_17(vol->vol_expiration_time, t->vol_expiration_time,
                         t->always_gmt);
+    } else {
+       for(i = 0; i < 16; i++)
+           vol->vol_expiration_time[i] = '0';
+       vol->vol_expiration_time[16] = 0;
+    }
 
-    if (t->vol_effective_time > 0)
+    if (t->vol_effective_time > 0) {
         iso_datetime_17(vol->vol_effective_time, t->vol_effective_time,
                         t->always_gmt);
+    } else {
+       for(i = 0; i < 16; i++)
+           vol->vol_effective_time[i] = '0';
+       vol->vol_effective_time[16] = 0;
+    }
 }
 
 /**