diff --git a/SurfTriMeshBooleans.cpp b/SurfTriMeshBooleans.cpp
index 8d57639..c207da5 100644
--- a/SurfTriMeshBooleans.cpp
+++ b/SurfTriMeshBooleans.cpp
@@ -1332,7 +1332,7 @@ SurfTriMesh::AmbiguosTriangleManager( TRIA3DVECTORMAP& Ambiguos, SurfTriMesh& Su
 { 
    for ( auto it = Ambiguos.begin() ; it != Ambiguos.end() ; ++ it) {
       Triangle3d trTria ;
-      GetTriangle( it->first, trTria) ;
+      Surf.GetTriangle( it->first, trTria) ;
       trTria.Validate() ;
       Point3d ptBar = ( trTria.GetP( 0) + trTria.GetP( 1) + trTria.GetP( 2)) / 3 ;
       double dMinDist = DBL_MAX ;