diff --git a/data/as-set/AS4242420181:AS-TRANSIT b/data/as-set/AS4242420181:AS-TRANSIT
index a544b8555..0b24dc3c6 100644
--- a/data/as-set/AS4242420181:AS-TRANSIT
+++ b/data/as-set/AS4242420181:AS-TRANSIT
@@ -24,3 +24,4 @@ remarks:            TCHEKDA-MNT
 members:            AS4242421722
 remarks:            WXMN-MNT
 members:            AS4242422227
+source:             DN42