diff --git a/EInAPI.h b/EInAPI.h
index e7c4790..c68684c 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -514,10 +514,12 @@ EIN_EXPORT BOOL __stdcall EgtMergeCurvesInCurveCompo( int nId, double dLinTol, B
 // GeomDb Surf Modify
 EIN_EXPORT BOOL __stdcall EgtInvertSurface( int nId) ;
 EIN_EXPORT int  __stdcall EgtExplodeSurface( int nId, int* pnCount) ;
+EIN_EXPORT BOOL __stdcall EgtApproxSurface( int nId, double dLinTol) ;
 EIN_EXPORT BOOL __stdcall EgtSurfFrAdd( int nId1, int nId2) ;
 EIN_EXPORT BOOL __stdcall EgtSurfFrSubtract( int nId1, int nId2) ;
 EIN_EXPORT BOOL __stdcall EgtSurfFrIntersect( int nId1, int nId2) ;
 EIN_EXPORT BOOL __stdcall EgtSurfFrOffset( int nId, double dDist, int nType) ;
+EIN_EXPORT int  __stdcall EgtSurfTmToTriangles( int nId, int* pnCount) ;
 EIN_EXPORT BOOL __stdcall EgtSurfTmRemoveFacet( int nId, int nFacet) ;
 EIN_EXPORT BOOL __stdcall EgtCutSurfTmPlane( int nId, const double ptOn[3], const double vtN[3], BOOL bSaveOnEq, int nRefType) ;
 EIN_EXPORT BOOL __stdcall EgtCutSurfTmClosedCurve( int nSurfId, int nCurveId, BOOL bSaveOnEq) ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index b65cff3..0af4e4b 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -567,6 +567,7 @@ EXE_EXPORT bool ExeReorderCurvesInGroup( int nGroupId, const Point3d& ptNear, in
 // GeomDb Surf Modify
 EXE_EXPORT bool ExeInvertSurface( const INTVECTOR& vIds) ;
 EXE_EXPORT int  ExeExplodeSurface( int nId, int* pnCount) ;
+EXE_EXPORT bool ExeApproxSurface( int nId, double dLinTol) ;
 EXE_EXPORT bool ExeSurfFrAdd( int nId1, int nId2) ;
 EXE_EXPORT bool ExeSurfFrSubtract( int nId1, int nId2) ;
 EXE_EXPORT bool ExeSurfFrIntersect( int nId1, int nId2) ;