diff --git a/lib/livebook_web/live/home_live/close_session_component.ex b/lib/livebook_web/live/home_live/close_session_component.ex
index d45e23175..711478aec 100644
--- a/lib/livebook_web/live/home_live/close_session_component.ex
+++ b/lib/livebook_web/live/home_live/close_session_component.ex
@@ -11,7 +11,10 @@ defmodule LivebookWeb.HomeLive.CloseSessionComponent do
       <p class="text-gray-700">
         Are you sure you want to close this section -
         <span class="font-semibold">“<%= @session.notebook_name %>”</span>?
-        This won't delete any persisted files.
+        <br/>
+        <%= if @session.file,
+              do: "This won't delete any persisted files.",
+              else: "The notebook is not persisted and all content will be lost." %>
       </p>
       <div class="mt-8 flex justify-end space-x-2">
         <button class="button button-red" phx-click="close" phx-target={@myself}>