diff --git a/backend/handler/database/roms_handler.py b/backend/handler/database/roms_handler.py
index 9e6aa5a9a..b91be4e16 100644
--- a/backend/handler/database/roms_handler.py
+++ b/backend/handler/database/roms_handler.py
@@ -955,6 +955,7 @@ class DBRomsHandler(DBBaseHandler):
             session.query(
                 subquery.c.letter, func.min(subquery.c.position - 1).label("position")
             )
+            .filter(subquery.c.letter.isnot(None))
             .group_by(subquery.c.letter)
             .order_by(subquery.c.letter)
             .all()