diff --git a/EGkCurveByInterp.h b/EGkCurveByInterp.h
index a64c1f5..b1c8251 100644
--- a/EGkCurveByInterp.h
+++ b/EGkCurveByInterp.h
@@ -36,7 +36,7 @@ class CurveByInterp
 
    public :
       enum METHOD { BESSEL = 1, AKIMA = 2, AKIMA_CORNER = 3} ;
-      enum TYPE { BIARCS = 1, CUBIC_BEZIERS = 2} ;
+      enum TYPE { BIARCS = 1, CUBIC_BEZIERS = 2, CUBIC_BEZIERS_LONG = 3} ;
 
    private :
       bool CalcAkimaTangents( bool bDetectCorner) ;
diff --git a/EXeConst.h b/EXeConst.h
index 22bba6c..2d138e5 100644
--- a/EXeConst.h
+++ b/EXeConst.h
@@ -59,7 +59,8 @@ const int RTY_DEFAULT = RTY_LOC ;
 //----------------- Costanti tipo di interpolazione ----------------------------
 enum InterpType{ ITT_ARCS = 0,              // stima tg Akima, curve risultanti archi
                  ITT_ARCS_CORNER = 1,       // stima tg AkimaCorner, curve risultanti archi
-                 ITT_CUBICS = 2} ;          // stima tg Bessel, curve risultanti Bezier cubiche
+                 ITT_CUBICS = 2,            // stima tg Bessel, curve risultanti Bezier cubiche
+                 ITT_CUBICS_LONG = 3} ;     // interpolazione con nurbs, poi convertite in bezier   
 
 //----------------- Costanti tipo di approssimazione di curve ------------------
 enum ApprType{ APP_LINES = 0,                // come ICurve::APL_STD