diff --git a/EGkPolyLine.h b/EGkPolyLine.h
index 216e95f..61d0e42 100644
--- a/EGkPolyLine.h
+++ b/EGkPolyLine.h
@@ -135,6 +135,7 @@ typedef std::list<PolyLine>    POLYLINELIST ;     // lista di PolyLine
 
 //----------------------------------------------------------------------------
 EGK_EXPORT bool DistPointPolyLine( const Point3d& ptP, const PolyLine& plPoly, double& dDist) ;
+EGK_EXPORT bool DistPointPolyLine( const Point3d& ptP, const PolyLine& plPoly, double& dDist, double& dMinDistPar) ;
 EGK_EXPORT bool IsPointInsidePolyLine( const Point3d& ptP, const PolyLine& plPoly, double dToler) ;
 EGK_EXPORT bool GetPointParamOnPolyLine( const Point3d& ptP, const PolyLine& plPoly, double dToler, double& dPar) ;
 EGK_EXPORT bool ChangePolyLineStart( PolyLine& plPoly, const Point3d& ptNewStart, double dToler) ;