diff --git a/lazy_player/main_window.py b/lazy_player/main_window.py
index a6131e7..b24d241 100644
--- a/lazy_player/main_window.py
+++ b/lazy_player/main_window.py
@@ -463,7 +463,7 @@ class MainWindow(Gtk.ApplicationWindow, Watcher):
             for i in range(self.list_model.get_n_items()):
                 if item := self.list_model.get_item(i):
                     assert isinstance(item, FileItem)
-                    if not item.attempted_thumbnail.value:
+                    if item.file_type != FileType.DIRECTORY and not item.attempted_thumbnail.value:
                         self.thumbnailer.generate_thumbnail(item)
                         break