diff --git a/Sawing.cpp b/Sawing.cpp
index a4db978..ad6ed75 100644
--- a/Sawing.cpp
+++ b/Sawing.cpp
@@ -1603,6 +1603,15 @@ Sawing::ProcessPath( int nPathId, int nPvId, int nClId)
    double dThick ;
    pCompo->GetThickness( dThick) ;
 
+  // aggiusto eventuali normali inverse di archi rispetto ad estrusione
+   const ICurve* pCrv = pCompo->GetFirstCurve() ;
+   while ( pCrv != nullptr) {
+      const ICurveArc* pArc = GetCurveArc( pCrv) ;
+      if ( pArc != nullptr  &&  pArc->GetNormVersor() * vtExtr < 0)
+         const_cast<ICurveArc*>(pArc)->InvertN() ;
+      pCrv = pCompo->GetNextCurve() ;
+   }
+
   // recupero distanza da fondo dei grezzi interessati dal percorso
    double dRbDist, dAllRbDist ;
    double dToler = 2 * m_TParams.m_dThick + tan( abs( m_Params.m_dSideAngle) * DEGTORAD) * m_TParams.m_dMaxMat ;