diff --git a/libsrc/stlgeom/vsstl.cpp b/libsrc/stlgeom/vsstl.cpp
index cbd14cb6..42d5db1c 100644
--- a/libsrc/stlgeom/vsstl.cpp
+++ b/libsrc/stlgeom/vsstl.cpp
@@ -22,7 +22,7 @@ namespace netgen
 /* *********************** Draw STL Geometry **************** */
 
 extern STLGeometry * stlgeometry;
-extern AutoPtr<Mesh> mesh;
+extern shared_ptr<Mesh> mesh;
 
 
 // #include "../../ngtcltk/mvdraw.hpp"