diff --git a/data/mntner/RIPNET-MNT b/data/mntner/RIPNET-MNT
index 3a1aed4a9..9096d3c44 100644
--- a/data/mntner/RIPNET-MNT
+++ b/data/mntner/RIPNET-MNT
@@ -2,4 +2,5 @@ mntner:             RIPNET-MNT
 descr:              RIPnet, home of LMAO.RIP
 admin-c:            RIPNET-DN42
 tech-c:             RIPNET-DN42
-mnt-by:             RIPNET-MNT
\ No newline at end of file
+mnt-by:             RIPNET-MNT
+source:             DN42
\ No newline at end of file