diff --git a/xorriso/opts_p_z.c b/xorriso/opts_p_z.c
index 2e2214de..155e04f4 100644
--- a/xorriso/opts_p_z.c
+++ b/xorriso/opts_p_z.c
@@ -2099,7 +2099,9 @@ int Xorriso_option_zisofs(struct XorrisO *xorriso, char *mode, int flag)
      xorriso->zlib_level= num;
 
    } else if(strncmp(cpt, "ziso_used=", 10) == 0 ||
-             strncmp(cpt, "osiz_used=", 10) == 0) {
+             strncmp(cpt, "osiz_used=", 10) == 0 ||
+             strncmp(cpt, "gzip_used=", 10) == 0 ||
+             strncmp(cpt, "gunzip_used=", 12) == 0) {
      /* (ignored info from -status) */;
 
    } else if(strncmp(cpt, "block_size=", 11)==0) {
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 4bffc5ba..b09e5e9b 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2013.10.08.175702"
+#define Xorriso_timestamP "2013.10.14.140028"