diff --git a/xorriso/disk_ops.c b/xorriso/disk_ops.c
index 65aa07c8..83c89513 100644
--- a/xorriso/disk_ops.c
+++ b/xorriso/disk_ops.c
@@ -132,7 +132,7 @@ ex:;
 int Xorriso_convert_uidstring(struct XorrisO *xorriso, char *uid_string,
                               uid_t *uid, int flag)
 {
- double num;
+ double num= 0.0;
  char text[80];
  struct passwd *pwd;
 
@@ -156,7 +156,7 @@ int Xorriso_convert_uidstring(struct XorrisO *xorriso, char *uid_string,
 int Xorriso_convert_gidstring(struct XorrisO *xorriso, char *gid_string,
                               gid_t *gid, int flag)
 {
- double num;
+ double num= 0.0;
  char text[80];
  struct group *grp;
 
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 49808655..1d33e267 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2011.05.06.120655"
+#define Xorriso_timestamP "2011.05.06.120834"