diff --git a/data/mntner/MARKMCN-MNT b/data/mntner/MARKMCN-MNT
index 83fdd073e..d61e64e8c 100644
--- a/data/mntner/MARKMCN-MNT
+++ b/data/mntner/MARKMCN-MNT
@@ -3,3 +3,4 @@ admin-c:            MARKMCN-DN42
 tech-c:             MARKMCN-DN42
 mnt-by:             MARKMCN-MNT
 source:             DN42
+auth:               gpg-fingerprint 93E39F5BE377C2EC6606A7BF995A440FAEE3256A
\ No newline at end of file