diff --git a/EGkBiArcs.h b/EGkBiArcs.h
index f25d7bb..ad8a3c0 100644
--- a/EGkBiArcs.h
+++ b/EGkBiArcs.h
@@ -25,4 +25,5 @@
 
 //-----------------------------------------------------------------------------
 EGK_EXPORT ICurve* GetBiArc( const Point3d& ptP0, double dDir0Deg, const Point3d& ptP1, double dDir1Deg, double dU) ;
+EGK_EXPORT ICurve* GetBiArc( const PolyLine& PL, double dU0, double dDir0Deg, double dU1, double dDir1Deg) ;