diff --git a/OffsetCurve.cpp b/OffsetCurve.cpp
index 47dc514..d3e5adc 100644
--- a/OffsetCurve.cpp
+++ b/OffsetCurve.cpp
@@ -959,7 +959,7 @@ VerifyAndAdjustExternalAngle( ICurve* pCrv1, ICurve* pCrv2, double dAngDeg, doub
       nType = ICurve::OFF_CHAMFER ;
 
   // se angolo esterno molto piccolo, semplifico tutto
-   const double SMALL_EXT_ANG = 1.0 ;
+   const double SMALL_EXT_ANG = 0.1 ;
    bool bAngSmall = ( abs( dAngDeg) < SMALL_EXT_ANG) ;
    if ( bAngSmall)
       nType = ICurve::OFF_EXTEND ;