diff --git a/CurveComposite.cpp b/CurveComposite.cpp
index d4f3694..50cf2f0 100644
--- a/CurveComposite.cpp
+++ b/CurveComposite.cpp
@@ -2642,7 +2642,7 @@ CurveComposite::MergeTwoCurves( ICurve* pCrvP, ICurve* pCrvC, double& dCurrLinTo
       if ( pArcP->GetNormVersor() * pArcC->GetNormVersor() * pArcP->GetAngCenter() * pArcC->GetAngCenter() < 0)
          return false ;
      // verifico di non superare l'angolo giro al centro
-      if ( abs( pArcP->GetAngCenter() + pArcC->GetAngCenter()) > ANG_FULL)
+      if ( abs( pArcP->GetAngCenter() + pArcC->GetAngCenter()) > ANG_FULL + EPS_ANG_SMALL)
          return false ;
      // se archi piatti
       if ( pArcP->IsFlat()  &&  pArcC->IsFlat()) {