diff --git a/beetsplug/lastgenre/__init__.py b/beetsplug/lastgenre/__init__.py
index 70b1774e3..a9beebe94 100644
--- a/beetsplug/lastgenre/__init__.py
+++ b/beetsplug/lastgenre/__init__.py
@@ -375,7 +375,7 @@ class LastGenrePlugin(plugins.BeetsPlugin):
 
         def _try_resolve_stage(
             stage_label: str, keep_genres: list[str], new_genres: list[str]
-        ) -> tuple[str, str] | None:
+        ) -> tuple[list[str], str] | None:
             """Try to resolve genres for a given stage and log the result."""
             resolved_genres = self._combine_resolve_and_log(
                 keep_genres, new_genres