diff --git a/libsrc/csg/vscsg.cpp b/libsrc/csg/vscsg.cpp
index 2074ecae..d33e5a3f 100644
--- a/libsrc/csg/vscsg.cpp
+++ b/libsrc/csg/vscsg.cpp
@@ -17,7 +17,7 @@ namespace netgen
 
   /* *********************** Draw Geometry **************** */
 
-  extern AutoPtr<Mesh> mesh;
+  extern shared_ptr<Mesh> mesh;
   extern Array<SpecialPoint> specpoints;
   extern Array<Box<3> > boxes;