diff --git a/xorriso/iso_manip.c b/xorriso/iso_manip.c
index 34d5177f..c35f5245 100644
--- a/xorriso/iso_manip.c
+++ b/xorriso/iso_manip.c
@@ -365,7 +365,7 @@ int Xorriso_add_tree(struct XorrisO *xorriso, IsoDir *dir,
  char *name, *img_name, *srcpt, *stbuf_src= "";
  struct stat stbuf, hstbuf;
  dev_t dir_dev;
- struct LinkiteM *own_link_stack;
+ struct LinkiteM *own_link_stack = NULL;
  char *sfe= NULL, *sfe2= NULL;
  char *disk_path= NULL, *img_path= NULL, *link_target= NULL;