diff --git a/libsrc/meshing/meshclass.cpp b/libsrc/meshing/meshclass.cpp
index 6e55b845..2bdac6f1 100644
--- a/libsrc/meshing/meshclass.cpp
+++ b/libsrc/meshing/meshclass.cpp
@@ -351,18 +351,19 @@ namespace netgen
     */
 
     // add lock-free to list
-    /*
+
     surfelements[sei].next = facedecoding[el.index-1].firstelement;
     auto & head = reinterpret_cast<atomic<SurfaceElementIndex>&> (facedecoding[el.index-1].firstelement);
     while (!head.compare_exchange_weak (surfelements[sei].next, sei))
       ;
-    */
+
+    /*
     surfelements[sei].next = facedecoding[el.index-1].firstelement;
     auto & head = reinterpret_cast<atomic<int>&> (facedecoding[el.index-1].firstelement);
     auto & next = reinterpret_cast<int&> (surfelements[sei].next);
     while (!head.compare_exchange_weak (next, sei))
       ;
-
+    */
     
     /*
     if (SurfaceArea().Valid())