diff --git a/data/mntner/XYZ479-MNT b/data/mntner/XYZ479-MNT
index 3f61c575d..88a361121 100644
--- a/data/mntner/XYZ479-MNT
+++ b/data/mntner/XYZ479-MNT
@@ -1,5 +1,5 @@
 mntner:             XYZ479-MNT
 admin-c:            XYZ479-DN42
 tech-c:             XYZ479-DN42
-mnt-by:             XTZ479-MNT
+mnt-by:             XYZ479-MNT
 source:             DN42