diff --git a/ng_src/isofs_wrap.c b/ng_src/isofs_wrap.c
index 93444ed2..7daa2066 100644
--- a/ng_src/isofs_wrap.c
+++ b/ng_src/isofs_wrap.c
@@ -152,7 +152,8 @@ int isoburn_read_image(struct burn_drive *d,
  ret = isoburn_disc_get_msc1(d, (int*) &ropts.block);
  if (ret < 0)
    return -2;
-	
+
+ memset((char *) &ropts, 0, sizeof(ropts));
  ropts.norock = read_opts->norock;
  ropts.nojoliet = read_opts->nojoliet;
  ropts.preferjoliet = read_opts->preferjoliet;