diff --git a/API_GdbGetSurf.cpp b/API_GdbGetSurf.cpp
index 207811d..4bcc3f2 100644
--- a/API_GdbGetSurf.cpp
+++ b/API_GdbGetSurf.cpp
@@ -214,9 +214,9 @@ __stdcall EgtSurfTmFacetsContact( int nId, int nF1, int nF2, int nRefId,
 
 //----------------------------------------------------------------------------
 int
-__stdcall EgtGetSurfTmSilhouette( int nId, const double vtDir[3], int nDestGrpId, int nRefType, int* pnCount)
+__stdcall EgtGetSurfTmSilhouette( int nId, const double vtDir[3], double dToler, int nDestGrpId, int nRefType, int* pnCount)
 {
-   return ExeGetSurfTmSilhouette( nId, vtDir, nDestGrpId, nRefType, pnCount) ;
+   return ExeGetSurfTmSilhouette( nId, vtDir, dToler, nDestGrpId, nRefType, pnCount) ;
 }
 
 //----------------------------------------------------------------------------
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 54a4378..ad8c84f 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ