diff --git a/beets/importer.py b/beets/importer.py
index 758e1d30b..4d796982f 100644
--- a/beets/importer.py
+++ b/beets/importer.py
@@ -182,7 +182,7 @@ class ImportState:
         """
         return toppath in self.tagprogress
 
-    def progress_reset(self, toppath: PathBytes):
+    def progress_reset(self, toppath: PathBytes | None):
         """Reset the progress for `toppath`."""
         with self as state:
             if toppath in state.tagprogress:
@@ -1161,7 +1161,7 @@ class SentinelImportTask(ImportTask):
         pass
 
     def save_progress(self):
-        if self.paths is None and self.toppath:
+        if not self.paths:
             # "Done" sentinel.
             ImportState().progress_reset(self.toppath)
         elif self.toppath: