diff --git a/beets/config_default.yaml b/beets/config_default.yaml
index d35368ea5..58136d56f 100644
--- a/beets/config_default.yaml
+++ b/beets/config_default.yaml
@@ -98,5 +98,6 @@ match:
         media: []
         original_year: no
     ignored: []
+    required: []
     track_length_grace: 10
     track_length_max: 30