diff --git a/source/blender/blenkernel/intern/node.cc b/source/blender/blenkernel/intern/node.cc
index 8028f990c42..35b91ea7dd8 100644
--- a/source/blender/blenkernel/intern/node.cc
+++ b/source/blender/blenkernel/intern/node.cc
@@ -129,6 +129,7 @@ static void ntree_init_data(ID *id)
 
 static void ntree_copy_data(Main * /*bmain*/, ID *id_dst, const ID *id_src, const int flag)
 {
+  std::cout << "Copy " << id_src->name << "\n";
   bNodeTree *ntree_dst = (bNodeTree *)id_dst;
   const bNodeTree *ntree_src = (const bNodeTree *)id_src;