diff --git a/EXE_GdbCreateCurve.cpp b/EXE_GdbCreateCurve.cpp
index be6f242..a92f16c 100644
--- a/EXE_GdbCreateCurve.cpp
+++ b/EXE_GdbCreateCurve.cpp
@@ -2062,6 +2062,8 @@ ExeCreateCurveCompoByInterpolation( int nParentId, const PolyLine& PL, int nType
       nMethod = CurveByInterp::BESSEL ;
       nCrvType = CurveByInterp::CUBIC_BEZIERS ;
    }
+   else if ( nType == ITT_CUBICS_LONG)
+      nCrvType = CurveByInterp::CUBIC_BEZIERS_LONG ;
   // oggetto interpolatore
    CurveByInterp crvByInterp ;
    Point3d ptP ;