diff --git a/bazarr/subtitles/upgrade.py b/bazarr/subtitles/upgrade.py
index 1f6bcb077..b1716cea6 100644
--- a/bazarr/subtitles/upgrade.py
+++ b/bazarr/subtitles/upgrade.py
@@ -86,7 +86,7 @@ def upgrade_subtitles():
     if settings.general.getboolean('use_radarr'):
         upgradable_movies_conditions = [(TableHistoryMovie.action << query_actions),
                                         (TableHistoryMovie.timestamp > minimum_timestamp),
-                                        (TableHistoryMovie.score is not None)]
+                                        (TableHistoryMovie.score.is_null(False))]
         upgradable_movies_conditions += get_exclusion_clause('movie')
         upgradable_movies = TableHistoryMovie.select(TableHistoryMovie.video_path,
                                                      TableHistoryMovie.language,