diff --git a/aqt/editor.py b/aqt/editor.py
index 5e82b0648..963987326 100644
--- a/aqt/editor.py
+++ b/aqt/editor.py
@@ -462,6 +462,8 @@ class Editor(object):
                     "editFocusLost", False, self.note, self.currentField):
                     # something updated the note; schedule reload
                     def onUpdate():
+                        if not self.note:
+                            return
                         self.stealFocus = True
                         self.loadNote()
                         self.checkValid()