diff --git a/ab/ablib01.h b/ab/ablib01.h
index 559f69f60..7687b27c0 100755
--- a/ab/ablib01.h
+++ b/ab/ablib01.h
@@ -104,10 +104,6 @@ public:
     {return FALSE;}
   virtual bool goto_lbrother() 
     {return FALSE;}
-  virtual bool goto_root() {return FALSE;}
-  virtual bool goto_firstson() {return FALSE;}
-  virtual bool goto_rbrother() {return FALSE;}
-  virtual TObject * curr_node() const {return NULL;}
   TAlbero_bidir() {}
   virtual ~TAlbero_bidir() {}
 };
@@ -493,4 +489,4 @@ class TABsaldo: public TAlbero_AB
 };
     
 
-#endif //__ANALISI_H
\ No newline at end of file
+#endif //__ANALISI_H