diff --git a/libisofs/filesrc.c b/libisofs/filesrc.c
index b66c41d..0e69728 100644
--- a/libisofs/filesrc.c
+++ b/libisofs/filesrc.c
@@ -30,13 +30,6 @@ int iso_file_src_cmp(const void *n1, const void *n2)
     iso_stream_get_id(f1->stream, &fs_id1, &dev_id1, &ino_id1);
     iso_stream_get_id(f2->stream, &fs_id2, &dev_id2, &ino_id2);
 
-#ifdef Libisofs_file_src_cmp_non_zerO
-    if (fs_id1 == 0 && dev_id1 == 0 && ino_id1 == 0)
-        return -1;
-    if (fs_id2 == 0 && dev_id2 == 0 && ino_id2 == 0)
-        return 1;
-#endif
-
     if (fs_id1 < fs_id2) {
         return -1;
     } else if (fs_id1 > fs_id2) {
diff --git a/libisofs/libisofs.h b/libisofs/libisofs.h
index d0e70ef..da47774 100644
--- a/libisofs/libisofs.h
+++ b/libisofs/libisofs.h
@@ -5081,12 +5081,5 @@ struct burn_source {
 */
 #define Libisofs_with_iso_iconV yes
 
-/* Experiment: Regarding (fs_id == 0 && dev_id == 0 && ino_id == 0)
-                  as always unique.
-   LOOKS DANGEROUS: iso_rbtree_insert() seems to need equality
-
- #ifdef Libisofs_file_src_cmp_non_zerO yes
-*/
-
 
 #endif /*LIBISO_LIBISOFS_H_*/