diff --git a/EGkVolZmap.h b/EGkVolZmap.h
index 3a3fc07..4e9f9ac 100644
--- a/EGkVolZmap.h
+++ b/EGkVolZmap.h
@@ -52,9 +52,9 @@ class __declspec( novtable) IVolZmap : public IGeoObj
                                 const Point3d& ptPe, const Vector3d& vtDe, const Vector3d& vtAe) = 0 ;
       virtual bool GetDepth( const Point3d& ptP, const Vector3d& vtDir, double& dInLength, double& dOutLength, bool bExact) const = 0 ;
       virtual bool GetPlaneIntersection( const Plane3d& plPlane, ICURVEPOVECTOR& vpLoop) const = 0 ;
-      virtual bool AvoidBox( const Frame3d& frBox, const Vector3d& vtDiag) const = 0 ;
-      virtual bool AvoidSphere( const Point3d& ptCenter, double dRad) const = 0 ;
-      virtual bool AvoidCylinder( const Frame3d& frCyl, double dL, double dR) const = 0 ;
+      virtual bool AvoidBox( const Frame3d& frBox, const Vector3d& vtDiag, double dSafeDist) const = 0 ;
+      virtual bool AvoidSphere( const Point3d& ptCenter, double dRad, double dSafeDist) const = 0 ;
+      virtual bool AvoidCylinder( const Frame3d& frCyl, double dH, double dR, double dSafeDist) const = 0 ;
       virtual IVolZmap* ClonePart( int nPart) const = 0 ;
       virtual bool RemovePart( int nPart) = 0 ;
       virtual bool Cut( const Plane3d& plPlane) = 0 ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 9210b73..c597695 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -507,8 +507,9 @@ EXE_EXPORT bool ExeVolZmapMillingStep( int nId, const Point3d& ptPs, const Vecto
                                                 const Point3d& ptPe, const Vector3d& vtDe, const Vector3d& vtAe, int nRefType) ;
 EXE_EXPORT bool ExeVolZmapGetDepth( int nId, const Point3d& ptP, const Vector3d& vtDir, int nRefType, bool bExact,
                                     double& dInLen, double& dOutLen) ;
-EXE_EXPORT bool ExeVolZmapAvoidBox( int nId, const Frame3d& frBox, const Vector3d& vtDiag, int nRefType) ;
-EXE_EXPORT bool ExeVolZmapAvoidSphere( int nId, const Point3d& ptCen, double dRad, int nRefType) ;
+EXE_EXPORT bool ExeVolZmapAvoidBox( int nId, const Frame3d& frBox, const Vector3d& vtDiag, double dSafeDist, int nRefType) ;
+EXE_EXPORT bool ExeVolZmapAvoidSphere( int nId, const Point3d& ptCen, double dRad, double dSafeDist, int nRefType) ;
+EXE_EXPORT bool ExeVolZmapAvoidCylinder( int nId, const Frame3d& frCyl, double dL, double dR, double dSafeDist, int nRefType) ;
 EXE_EXPORT bool ExeCutVolZmapPlane( int nId, const Point3d& ptOn, const Vector3d& vtN, int nRefType) ;
 
 // Geo Snap Vector/Point/Frame