diff --git a/libisoburn/trunk/ng_src/isoburn.c b/libisoburn/trunk/ng_src/isoburn.c
index 40a24697..e63621a3 100644
--- a/libisoburn/trunk/ng_src/isoburn.c
+++ b/libisoburn/trunk/ng_src/isoburn.c
@@ -252,11 +252,16 @@ int isoburn_prepare_disc_aux(struct burn_drive *d, struct burn_disc **disc,
    return -2;
  }
 
+ memset((char *) &wopts, 0, sizeof(wopts));
  wopts.level = opts->level;
  wopts.rockridge = opts->rockridge;
  wopts.joliet = opts->joliet;
  wopts.omit_version_numbers = opts->omit_version_numbers;
  wopts.allow_deep_paths = opts->allow_deep_paths;
+ wopts.max_37_char_filenames = opts->max_37_char_filenames;
+ wopts.no_force_dots = opts->no_force_dots;
+ wopts.allow_lowercase = opts->allow_lowercase;
+ wopts.allow_full_ascii = opts->allow_full_ascii;
  wopts.joliet_longer_paths = opts->joliet_longer_paths;
  /* wopts.copy_eltorito = opts->copy_eltorito; */
  wopts.sort_files = opts->sort_files;
diff --git a/libisoburn/trunk/ng_src/libisoburn.h b/libisoburn/trunk/ng_src/libisoburn.h
index a967f427..ae043868 100644
--- a/libisoburn/trunk/ng_src/libisoburn.h
+++ b/libisoburn/trunk/ng_src/libisoburn.h
@@ -130,6 +130,10 @@ struct isoburn_source_opts {
     /* relaxed constraints */
     unsigned int omit_version_numbers :1;
     unsigned int allow_deep_paths :1;
+    unsigned int max_37_char_filenames :1;
+    unsigned int no_force_dots :1;
+    unsigned int allow_lowercase :1;
+    unsigned int allow_full_ascii :1;
     unsigned int joliet_longer_paths :1;
 
     unsigned int sort_files:1;