diff --git a/Polygon3d.cpp b/Polygon3d.cpp
index 2892c69..6e9b42e 100644
--- a/Polygon3d.cpp
+++ b/Polygon3d.cpp
@@ -173,7 +173,7 @@ Polygon3d::FromPlaneTrimmedWithBox( const Point3d& ptOn, const Vector3d& vtN,
 {
    Plane3d plPlane ;
    plPlane.Set( ptOn, vtN) ;
-   return FromPlaneTrimmedWithBox( plPlane, ptMin, ptMax, bOnEq, bOnCt) ;
+   return FromPlaneTrimmedWithBox( plPlane, ptMin, ptMax, bOnEq, bOnCt, dToler) ;
 }
 
 //----------------------------------------------------------------------------