diff --git a/CurveComposite.cpp b/CurveComposite.cpp
index 71bd653..696ddbc 100644
--- a/CurveComposite.cpp
+++ b/CurveComposite.cpp
@@ -863,8 +863,8 @@ CurveComposite::Validate( void)
      // se distanza superiore al limite ridotto forzo i punti a coincidere
       if ( ! AreSamePointEpsilon( ptStart, ptEnd, 0.01 * EPS_SMALL)) {
          Point3d ptM = Media( ptStart, ptEnd) ;
-         m_CrvSmplS.front()->ModifyEnd( ptM) ;
-         m_CrvSmplS.back()->ModifyStart( ptM) ;
+         m_CrvSmplS.front()->ModifyStart( ptM) ;
+         m_CrvSmplS.back()->ModifyEnd( ptM) ;
       }   
    }