diff --git a/core/handlers.py b/core/handlers.py
index db9b57dc6fbafedc267d2e97f8ef22ff4f29333a..fee0bdee41f2cc55d1992efe96669770b124aa1e 100644
--- a/core/handlers.py
+++ b/core/handlers.py
@@ -7,6 +7,7 @@ from sverchok import old_nodes
 from sverchok import data_structure
 from sverchok.core import upgrade_nodes, undo_handler_node_count
 from sverchok.core.update_system import set_first_run
+from sverchok.core.events import CurrentEvents, BlenderEventsTypes
 from sverchok.ui import color_def, bgl_callback_nodeview, bgl_callback_3dview
 from sverchok.utils import app_handler_ops
 from sverchok.utils.logging import debug