diff --git a/data/mntner/HESSENET-MNT b/data/mntner/HESSENET-MNT
index 9feff18a8..a416d7c16 100644
--- a/data/mntner/HESSENET-MNT
+++ b/data/mntner/HESSENET-MNT
@@ -3,3 +3,4 @@ sha512-pw:          YzZiYzhiYmY2MDFlOTYzMGMwMmJmMjM1MjJkZWI5MmU1MzY0Mzc5Mzg4ZTEy
 admin-c:            JAMIE9898-DN42
 tech-c:             JAMIE9898-DN42
 mnt-by:             HESSENET-MNT
+auth:               pgp-fingerprint F7EEAE63E08AD239BCD4AAE21BA1AE77B0D865AB