diff --git a/libisoburn/libisoburn.h b/libisoburn/libisoburn.h
index 5152bcb3..1b6bdb1a 100644
--- a/libisoburn/libisoburn.h
+++ b/libisoburn/libisoburn.h
@@ -204,6 +204,8 @@ void isoburn_finish(void);
 int isoburn_needs_emulation(struct burn_drive *drive);
  
 
+#ifdef Libburn_obsoleted_on_its_way_ouT
+    
 /** Caution: Use this with great care. It is not needed normally.
 
     This call can set the nwa block number to an arbitrary value. If ever, do
@@ -216,4 +218,5 @@ int isoburn_needs_emulation(struct burn_drive *drive);
 void isoburn_write_opts_set_start_byte(struct burn_write_opts *opts,
                                        off_t value);
 
+#endif /* Libburn_obsoleted_on_its_way_ouT */