diff --git a/edit.lua b/edit.lua
index 878979f..8c48ffc 100644
--- a/edit.lua
+++ b/edit.lua
@@ -162,6 +162,7 @@ function edit.draw(Editor)
                        end
                        schedule_save(Editor)
                        record_undo_event(Editor, {before=Editor.drawing_before, after=snapshot(Editor, line_index-1, line_index+1)})
+                       Editor.drawing_before = nil
                      end,
         })
       else